Why is my furnace fan not turning off?

The fan control should be set to AUTO.

You can try turning the switch to OFF too.

Other snafus such as a shorted thermostat wire can also cause the A/C or warm air furnace fan to run continuously.

Those problems are explained at THERMOSTAT WON'T TURN OFF.

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Why does my furnace blower turn on and off constantly?

The system uses a “temperature probe” to detect temperature changes inside the heat exchanger (see image below) and turns your blower on and off in response.So if your furnace blower is turning on and off when the furnace isn't in a heat cycle, it usually means the fan limit switch is defective.

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Why does my furnace turn on and off repeatedly?

Why a Clogged Furnace Air Filter Can Cause Your Furnace to Turn On and Off Repeatedly.If you remember from our orientation up above, the most common cause for your furnace to keep turning on and off is the High-Limit Switch, which turns the unit off if the temperature inside gets too high (as a s...

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Why does my furnace turn on when the heat is off?

This is most common cause of short cycling.A dirty air filter restricts air from getting into your furnace.Your furnace's heat exchanger needs that air blowing over it or it overheats, causing the furnace to shut down.Change (or wash, if you have a washable type) your air filter if it's dirty.

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If your fan does not cut off when you turn the car off why not?

Depending on the make and model of your car, the aircon control unit or the thermostat may be faulty.

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Why would a condersor fan not turn off once the car is off?

Engine Hot and requires additional cooling Check coolant level

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Why is my furnace running when thermostat is off?

Set your thermostat to a temperature that's lower than the current room temperature.This shuts the furnace down and prevents your thermostat from calling for more heat.If so, it's likely that you've set your set temperature too high, causing your furnace to heat continuously as it tries to reach ...

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Why won t the fan in my car turn off?

The ECM commands the cooling fan relay module box (on left front of engine compartment) to turn on the fans when needed.If the fans are on all the time, even after shutting off the car, then you have a stuck relay in the cooling fan relay box.The most common problem is the relay module box.

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Why does my AC Fan keep turning on and off?

Oh, the dirty air filter.It's the cause of most AC malfunctions and understandably so.A dirty filter restricts airflow and restricted airflow causes a whole slew of problems, including a frozen evaporator coil.This can cause the unit to malfunction by turning on and off in short bursts.

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Why does my thermostat not turn off?

Step 1: Check the Thermostat If an air conditioner does not automatically switch off, it may be because the temperature has been set too low.This action tells the air conditioner system to switch off.If the unit does not immediately turn off, then it is likely that the thermostat is not the prob...

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Why will my heater not turn off?

Other mechanical issues can also cause the heater to remain turned on.A defective check valve.For radiators and other heating systems that rely on hot water, a bad check valve can cause the heater to stay on.Without a working check valve, water circulates on its own to keep the heating system tur...

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Why are my headlights not turning off?

In that case, you can try setting the parking brake to see if that shuts the headlights off, as setting the parking brake typically disables daytime running lights.If a bad headlight relay is a reason that your headlights won't turn off, then the fix there is also to just replace the relay.

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Why is my fan still running after I turn my car off?

It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool.However, if the fan is running for an extended period, the fan itself can become damaged due to overuse.It's possible you may have a module or relay failing in your car.

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Why is my car radio not turning off?

Blown Fuse: One of the most common reasons for a car radio to stop working is a blown fuse.If the radio itself will not turn on, chances are good that there's one or more blown fuses causing the problem.A damaged antenna means that your radio isn't able to receive signal from stations.

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Why won't my fan turn off after I shut the car engine off for Mazda 6?

it's probably designed to stay on a while and cool the engine. I would want confirmation on that though.

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Why is my computer fan not working?

Most fans have 3 wires/pins.If your BIOS has been misconfigured or is outdated, you might have problems with your fan.If your CPU fan does not spin, the issue could be anywhere from the fan, the motherboard, to the power supply unit.The fan can get clogged with dust and lint hence preventing it f...

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Why would the fan in 1991 Cadillac DeVille not cut off even when the car is turned off?

Usally it's Because the Module 4 the AC burns out & goes 2 ground-& will kill the battery if not dsconnected.Some modules are mounted inside the car on the evaporater case with a couple of screws.

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Why do my windshield wipers not turn off?

Faulty park switch: Inside the wiper motor is a park switch.If this switch goes bad, then an electric current will go through your windshield wiper system even when it is turned off.Bad wiring: A loose wire or bad connection could also cause your windshield wipers to continue to run even when the...

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Why heater fan motor won't turn off after car is turned off?

well for one is your keyed turned all the way off. But i would say you probably have a short in you wiring somewhere. But try turning off the heater while the car is running then shut your car off.

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Why does my car radio not turn off?

Some car radios are on a timer, so they are designed to not shut off immediately.If the radio turns off after a few minutes, that's normal for your vehicle.If it still hasn't turned off, check if the dome lights turn off when the doors are shut.If the dome lights don't turn off, you might have a ...

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Why does my car light not turn off?

The likely cause of a dome light not turning off is either the dashboard light control knob being activated accidentally or a broken door switch.You can remove the wire from the door switch, if you are able to access the backside of the switch.The wire pulls off of the switch easily.

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How do I fix problem of My 2005 Town and Country Electric fan not shutting off when engine turned off?

sounds like a bad relay change the fan relay

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Why is my fan in my car not working?

If the sensor isn't working, your fan won't come on because it won't know that the temperature is hot enough to require activation, which can frequently lead to overheating.The sensor is usually located in the car thermostat cover.To check it, disconnect the wires from the sensor and touch them t...

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Why is my furnace filter dirty?

Your filter gets clogged faster when your furnace is running more often.That's because more air is cycled through your filter when your furnace goes through more heating cycles, so more contaminants get caught on the filter's media.The colder it gets outside, the faster your filter will get clogg...

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Do you have to turn off furnace to change filter?

To Change Your Home Air Filter, You'll Need To Turn Off Your Furnace.To prevent the HVAC unit from turning on while you are changing the filter, make sure you turn the thermostat to the “off” position.For maximum safety, disconnect power from your furnace system while you are doing maintenance.

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Why does my car fan keep running after I turn it off?

It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool.However, if the fan is running for an extended period, the fan itself can become damaged due to overuse.It's possible you may have a module or relay failing in your car.

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What do you do when your furnace won't turn off?

A furnace could potentially not turn off for a few different reasons. Replace your "furnace limit switch." Check the wiring to your furnace's thermostat. Check to make sure none of the controls or buttons on your furnace are sticking in the "Down" position.

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Heater fan motor will not cut off after turning car off?

Your blower motor relay went bad. You may also need to replace either the blower motor or one of the climate control sensors. If your blower motor squeals or makes a scraping sound it is going bad and will damage the blower motor relay. JQ

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1991 kawasaki 750 electric fan won't turn off when bike is off. why?

That's because the motor still needs to cool so the fan stays on to cool it. I had the same problem with my polaris ATV.If it continues runnig after the engine is cooled then it might be a bad sensor which is typically located on the radiator.Good luck,Drew

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My speedometer does not work when I turn on my air conditioner or if you turn off my heat why?

It seems as if there is a problem with the wiring between your speedometer and AC/heat unit. A licensed repairman can determine and fix the cause of this problem.

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Why is my car heater fan not working?

When a car heater doesn't blow at all, the problem is either a bad blower motor or something preventing power from getting to the blower.If the blower motor is getting power, it's probably a bad blower.If it isn't getting power, suspect the fuse, switch or blower resistor.

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Why is my turning signal not working?

V.Turn Signal Lights Don't Work Another common problem occurs when none of the turn signal lights work.Locate the fuse using your car owner's manual or vehicle repair manual, or check the 'Checking a Light Bulb Socket for Ground and Power' section above, or the 'Testing the Turn Signal Flasher' ...

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Why does my furnace make a loud noise when it turns on?

This can sometimes create booming or banging sounds when your air handler turns on and the pressure changes inside of your ducts.If this sound gets louder or occurs more frequently than usual, it's likely due to pressure buildup in your ducts that are caused by a clogged air filter or closed vent...

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Why can't I turn my headlights off?

In that case, you can try setting the parking brake to see if that shuts the headlights off, as setting the parking brake typically disables daytime running lights.If a bad headlight relay is a reason that your headlights won't turn off, then the fix there is also to just replace the relay.

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Car heater fan wont turn off?

I had this fault in my Chrysler Grand Voyager, we just took the Relay out of the engine and it went off, then to turn it back on just plug the relay back in, the relay's are either found in a box under the bonnet or in a compartment down near the steering wheel.

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Why won't my headlights turn off?

In that case, you can try setting the parking brake to see if that shuts the headlights off, as setting the parking brake typically disables daytime running lights.If a bad headlight relay is a reason that your headlights won't turn off, then the fix there is also to just replace the relay.

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Why did my car suddenly turn off?

Alternator Problems If your car suddenly stops running, it is possible that the alternator has gone bad.A faulty alternator will cut power supply to vital car components and you will notice the lights turning off in the dash or the engine abruptly losing power.

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Why wont my wipers turn off?

First remove the wiper fuse from the fuse box or remove the battery cables.Then replace the wiper selection switch.The switch is stuck in the on position and will not release.If you need further assistance with your wipers staying on, then seek out a professional, such as one from Your Mechanic, ...

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Why does my car keep turning off?

Another reason that makes your car shuts off while driving is issues with the fuel pump.If there is something clogging in the pump or filter, it will make your car turns off while driving on the roads suddenly.So, it is always mandatory to check and clean the fuel pump, filter before driving a lo...

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Why turning my ignition on and wont turn off?

Turning my ignition on and wont turn off because it is faulty.

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Why does my fan stay on when my car is off?

In today's modern vehicles it is considered normal for the engine cooling fan to keep running for a few minutes after you turn off the car.When the engine is turned off, the coolant doesn't circulate, and the heat stays trapped therefore prolonging the engine from cooling.

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Why is the air conditioning fan still running when you turn off your car?

It's probably the catalytic converter fan; not the a/c fan.

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Why does my car suddenly turn off?

Your car shuts off while driving suddenly may cause from the ignition switch.When the ignition switch is frazzled, this will lead to a loss or power to your engine due to vibration such as hitting a round patch of street.

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What would cause my windshield wipers to not turn off?

Common reasons for this to happen: Faulty park switch: Inside the wiper motor is a park switch.Bad wiring: A loose wire or bad connection could also cause your windshield wipers to continue to run even when they are turned off.

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Why does my fan keep running when my car is off?

It's normal for some vehicles to have a fan run for a few minutes after the car is shut off, generally to keep the engine cool.However, if the fan is running for an extended period, the fan itself can become damaged due to overuse.It's possible you may have a module or relay failing in your car.

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Why is my car shaking and turning off?

Shaking or vibration may be caused by many different things such as faulty spark plugs, poor fuel pressure or misfires.Other things such as a faulty idle air control valve may cause the engine idle to drop below the normal idling RPM which may also cause the motor to shake or vibrate more than no...

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Why do engine coolant fan keeping running after engine is turn off on 1999 intrigue?

The engine coolant fan can keep running after the engine is turned off in any car because the temperature gauge is in the radiator. As long as the radiator is still hot, the fan will keep running until the temperature gauge says it has cooled enough.

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Why would the fan run after a 1997 Honda accord is turned off?

Hello, Jamison here, It can run (and even start without the key on),, But if it runs continually, There is A problem,, Check the relay, or the temp. sender.,,,,,,,,,,,,,,,,,Good luck, Jamison. Not necessarily a problem, if it's the auxilary cooling fan. They can fun a few minutes if it's a hot da...

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Why does my car turn off while it is running?

Because there's something wrong with it. For a more detailed answer, take it to a mechanic.

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Why does my 2007 Chevy Equinox electric fans not work?

Because there's a fault somewhere, of course! You have two choices as to what to do here.. the first it to diagnose it, and see if the fault is in the thermostatic switch, power supply, relay(s), circuitry, or the fan itself. Once you've narrowed it down, then you correct and eliminate the fault....

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Why my Engine turns off while ac is running?

It could be that the engine is idled to low.A2: There is an idle solenoid to boost idle speed when A/C on. It may be defective or there is a wiring problem; switch, fuse, etc. It may also not be adjusted right. Look at the far side of it (Not the throttle side) ; it should have a wrench adjustmen...

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Why does your car radio not turn off when you turn the engine off?

Some cars have a time delay before it turns off. I had a Buick Park Avenue that was like that. If you open the door the radio should go off. If not, you may have a wiring problem.

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Why does my turn signal not blink?

The good news is that all of these symptoms point to two possible issues, a bad turn signal relay or a dead bulb.If the signal blinks really fast, you have a bulb out on that side.If it doesn't come on at all or doesn't blink, you'll need to replace your turn signal relay.

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Why does the free turning fan on a 1997 Plymouth Neon continue to turn after the car is off?

The fan is electric and is controlled by a thermoswitch in the radiator. When you turn the engine off the fan keeps running to prevent boilover until the coolant in the radiator cools off. Then it should switch off automatically. If it does not either the radiator thermoswitch or the fan motor re...

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Why is my radiator fan not working on my 203 Mazda Protege?

Temperature senor broke, fan motor quit, fan motor not getting power.

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Why wont my lights turn off in my car?

The likely cause of a dome light not turning off is either the dashboard light control knob being activated accidentally or a broken door switch.You can remove the wire from the door switch, if you are able to access the backside of the switch.The wire pulls off of the switch easily.

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Why is my car turning but not starting?

If a vehicle "turns over" but won't start, there is probably NOTHING WRONG with your starter, battery, or alternator.Cars that won't start when the engine is turned over by the starter usually have either a fuel supply problem or a no spark problem.A broken timing belt or chain can also stop your...

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Why do the head lightrunning light not turn off?

you needa get a new flasher go to an auto zone to get that itll run about 5 bucks If you own a GM product and depending on the year, there is an O on the headlight switch. Turn the switch to that position and hold it about 2 secs the lights will go out.

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My car fan not working?

There is probably shorted wiring, or the fuse is blown. Depending on the model year and make, the fuse box can be located under the driver side dashboard, or under the hood. I suggest buying a $10 test light and testing all your fuses, that way u can tell if it bad wiring or a bad fuse.It could a...

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Why car stereo will not turn off with the car?

the ACC wire from the stereo is connected to constant power (+12V)

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Why won't my headlights turn off when my car is off on my 1996 subaru legacy outback?

Do you mean the parking lights? if it's the parking lights that are on, check the switch on top of the steering column.

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Why don't the cooling fans turn off on your 2000 Mitsubishi eclipse?

The most common fault are that the fuse has blown or the thermostat is faulty.

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Why does my cars fan only turn on when the ac is on?

Your car fan turns on when you have your air condition unit on because, your engine heats up more when the air is on so the fan needs to come on to cool the engine down.

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Should you let your furnace fan running continuously?

Pros to Allowing Fan to as Needed: This option is much more cost effective, because you are using less energy.The fan's “AUTO” setting works with your heating + cooling system, so your fan is running the least amount of time needed, at the slowest speed.Your furnace filter will last longer.

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The cooling fan on my 02 Mini will not shut off any suggestions?

Same thing happened to me on my 02 MINI Open the hood and look for where the wiring connects to the electric fans. There's a black box where the wires go in. Get a screw driver or small mallet, just something to tap with. Rap on that black box a couple times and it will release the relay and turn...

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Why would my temp gauge shows the car not hearing up why does the car has heat how come fans run after car is off?

In most engines the gauge and cooling fans have different senders, so if you have good hot air blowing inside the car from the heating system and the cooling fans on the radiator are operating, and still no gauge reading, you may have the wire disconnected from the temp. sender. The cooling fans ...

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Why won't the cooling fan stop when you turn the car off?

It's thermo controlled, when temp falls below a certain point-it will. That's normal.

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Why does the fan in your 6.0 diesel keep turning on and off?

Thermostatic control to cool engine.

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How do I stopthe fan from running on my Mazda 626 if the car is turned off?

If it's the one on the radiator, and it stops running after a few minutes, then it's been designed by Mazda to work like that.If it runs until the battery goes flat, you have a short circuit somewhere, supplying the fan with power.

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Why does my Car turn off after going over bumps?

You may have a lose carbi and it would be sucking too much air and the mixture would be wrong.

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Why does my car smoke after turning off?

This is being caused by some fluid on the engine. You could have an oil leak somewhere and that is what is causing it to smoke only when the car gets turned off.

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Why does my car turn off at red lights?

If your car stalls out at red lights, it means that your engine suddenly can't control the idle.When your engine loses the ability to control the idle, this could be due to several factors, including the following: A malfunctioning or dirty mass air flow sensor.

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Why does my engine run after I turn it off?

When your engine keeps running after shutting it off, you'll hear it firing or coughing.This condition is also known as after-running or dieseling because combustion of the air-fuel mixture happens without the presence of the spark, just like in a diesel engine.

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Why does my furnace filter gets black really quick?

So, you're changing your gas furnace's filter and notice that it's got nasty black sooty substance on it.Gas-fired furnaces shouldn't produce soot.And, when left alone, soot can cause pricey problems like: Insulating the heat exchanger, lowering your furnace's efficiency as a result (meaning bigg...

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Why does my car start and then turn off?

An issue with the mass airflow sensor may manifest itself when a car starts and then stalls soon after starting.When an ignition coil begins to fail, it may struggle to provide consistent spark to the plugs, causing the engine to stall after starting.

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Why does my Car radio turn off and on?

The wires are proboly came loose or something.

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Why does my car start then turn off?

An issue with the mass airflow sensor may manifest itself when a car starts and then stalls soon after starting.When an ignition coil begins to fail, it may struggle to provide consistent spark to the plugs, causing the engine to stall after starting.

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Why won't my back brake lights turn off?

The most likely cause for the brake lights staying on is the brake light switch sticking closed.You can disconnect the plug from the brake light switch at the brake light pedal to see if the lights turn off.If they do, you will need a replacement brake light switch.

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Why does my car stereo suddenly turn off?

Fault in the wiring, loose harness pins, or bad head unit is what I'd be looking for.

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Why does my subwoofer pop when I turn it off?

The other pop is caused by the actual switch turning off.There is energy stored in the woofer (inductor) or in the capacitors of the amplifier, which causes a back-EMF when the circuit is cut, much like when you turn off a fluorescent light; sometimes you see a spark at the switch.

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Why did my check engine light turn off?

Reason #1 – A Loose or Faulty Gas Cap – Yes, surprisingly this can cause the Check Engine or Service Engine Soon light to come on.Start by taking the gas cap off and putting it back on.You'll then need to drive the vehicle a few times to get the Onboard Diagnostic (OBD) system to reset and turn t...

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Fan does not turn on to cool engine?

well first thing is first. is you have electric cooling fans, take the out and make sure they work by hooking them up too the battery. just simple take like some 4 gauge wire and connect the to the positive and negative terminals. place the other end of the positive wire to one of the connectors ...

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Why doesnt the cooling fan on a Mazda 626 lx not turning on?

probably the fan relay

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Why won't my Audi esp light turn off?

A bad brake sensor can cause the ESP light to stay on in an Audi. Other reasons the light stays on include a problem with the batter, loose clamp causing a leak in the intake, and worn brake pads.

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Why does my Mitsubishi eclipse turn off a stop lights?

NOT SURE BUT YOU CAN TAKE IT TO ADVANCED AUTO PARTS AND THEY'LL CHECK IT ON A COMPUTER FOR FREE.

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Why does my car turn off when I stop accelerating?

Common reasons for this to happen: Let's have a look at some of the more common causes that would make your car stall or stumble when you attempt to accelerate.Faulty ignition components: The ignition coil pulls power from the battery and delivers it to the spark plugs, which ignites the fuel and...

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Why does my AC keep turning on and off?

Oh, the dirty air filter.It's the cause of most AC malfunctions and understandably so.A dirty filter restricts airflow and restricted airflow causes a whole slew of problems, including a frozen evaporator coil.This can cause the unit to malfunction by turning on and off in short bursts.

Read more

Why does my car sputter after I turn it off?

Usually it's a sign of one or more of the following: (1) excessive gasoline remains inside the combustion chamber even after shutoff, causing "auto-ignition" (similar to dieseling due to compression ignition) even after you turn off your engine.(3) air filter is a bit clogged, causing the carb to...

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Why will my 1996 Old's Regency wipers not return to the home position or turn off until I shut off my car and restart it?

Check to see if the wiper motor is grounded properly. One of the bolts that hold the unit in place also has a ground strap that can loosen up and or get rusty.

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Why would your 1998 new beetle while turned off hours after driving have a fan sound coming on and off?

Your coolant temperature sensor could be malfunctioning and signaling the fans cool the engine. It is normal, especially, in hot whether for the cooling fans to come on randomly as the engine cools, but if the engine is already cold then there is an issue that needs to be addressed.

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Why your car steering wheel stay turn instead off being straight when you are not turning?

depending on the type of car, it could be a sign that the alignment is out, or simply the drag link needs adjusting as on some trucks. if it is not a truck, it will probably need to be on an alignment machine to correct it

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Why does my car radio keep turning off and on?

When a car stereo cuts out and then turns back on: The problem is usually in the wiring.If the display shuts off at the same time the music cuts out, then the unit is probably losing power.Tracking down the fault can be difficult when the radio is functioning, since it actually has power at that ...

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Why does my HVAC turn on and off?

Oh, the dirty air filter.It's the cause of most AC malfunctions and understandably so.A dirty filter restricts airflow and restricted airflow causes a whole slew of problems, including a frozen evaporator coil.This can cause the unit to malfunction by turning on and off in short bursts.

Read more

Why won't the lights turn off in my car?

The likely cause of a dome light not turning off is either the dashboard light control knob being activated accidentally or a broken door switch.You can remove the wire from the door switch, if you are able to access the backside of the switch.The wire pulls off of the switch easily.

Read more

Why does my AC compressor turn on and off?

Short cycling, when the compressor constantly shuts on and off, is one of the most common air conditioning problems.Several conditions cause short cycling, including a faulty or obstructed thermostat, leaking refrigerant, icy coils or an HVAC system that is too big for the building in which it is...

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Why does my car sputter when I turn it off?

Usually it's a sign of one or more of the following: (1) excessive gasoline remains inside the combustion chamber even after shutoff, causing "auto-ignition" (similar to dieseling due to compression ignition) even after you turn off your engine.(3) air filter is a bit clogged, causing the carb to...

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Why does my heat keep turning on and off?

#1: A dirty air filter The first (and most common) cause of short cycling furnace is a dirty air filter.A dirty filter restricts air from reaching your furnace's heat exchanger, which causes your furnace to overheat and then shut down.Eventually it will turn back on and the process will repeat i...

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Why does your 1992 acura legend cooling fans continue to run after your car is turned off?

Most cooling fans will stay on for a minute or so after turning off the car in warm weather. If they stay on past a minute or so, then there is a problem.

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What turns your furnace filter black?

Reasons Your Furnace Filter Is Black It's not normal, or healthy, for a furnace filter to turn completely black.If this happens, one of the following possibilities could be the cause: Candle soot: The blackened filter could have excess soot on it from burning candles.

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Why won't headlights on my Alpha Romeo not turn on?

Blown bulbs.Blown fuse.Faulty wiring.Faulty relay.Faulty switch.

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Fan remained on for an hour after turning off motor . disected the battery to shut off fan. never turned back on?

Engine Temperature Sensor Doesn't Work.

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