Car Fan Won T Stop Running

Rotated all the PDC relays around they have the same ID other than ABS pump. To check it just switch it with another relay of the same kind.

Electric Cooling Fan What Can Stop It From Working Properly And Why Electric Cooling Fan Automotive Repair Shop Cooling Fan

It wouldnt stop running.

. In fact engine heat can increase when you first shut them off since water pump is no longer circulating coolant as hot coolant expands from the heads and into the radiator the cooling fans need to run to bring that temp down. The cooling fan module is supposed to cool the car parts when they get too hot. - Connect batteryRIGHT side fan turns ON and LEFT side fan stays OFF - Turn ignition onRIGHT side continues to TURN LEFT sides does turn on once car is warmed up the LEFT side stops THIS IS NORMAL - Turn ignition offcar power shuts down as normal and RIGHT side continues to TURN.

What you thought was another relay 12 is actually fuse 12 for the vacuum pump. If the fan quits running after tapping or whacking if the urge is strong enough this could verify the problem is the relay. The other relay you pulled is actually 2 I believe and is for the vacuum pumpit is not a spare.

Coolant leaks from the water pump cracked radiator worn upper or lower radiator hoses leaky heater core leaky thermostat housing rusted coolant bypass pipe bad radiator fan relay short in the electrical wires and so. This sounds very normal. They do this until the temperature comes down to normal levels.

There is no battery to operate the blower. I pulled fuse 45 cooling fan 1 just to stop it from running. Sign in to reply.

Check in the connector plugs for any signs of corrosion. Usually when the cooling fans wont go off its because of the cooling fan relay. Faster And Cheaper Than Traditional Printed Manuals Users Get Instant Access To The Repair Information They Need For Any Car Truck Van Or Suv.

I think you are being taken for a ride. Actions so far. Here are some possibilities causing the fan to stay running longer.

I decided to disconnect the fan after letting it run for a few hours. The engine cooling fan decided to keep on running after the engine has been shutdown and it wouldnt stop. Checked for battery at the blower when the car is running.

Cooling fan relay probablyunder hood using relay fuse chart find the relay that controls cooling fanswap it out with identical type relay and see if it shuts off. Checked for incoming resistance ground to the blower from the dash control switch and it works. U are getting a constant 12volts to your cooling fanfollow 12v wire back from fan and see where it goes.

As for the fan running all of the time this can occur if the coolant level is low or if the engine is overheating. Wife came home and parked car 45 mins later cooling fan still running car cool. You can check resistance in the fan motors.

Broken Wiring or Bad connection. Checked the blower with direct power and it works. Up to 8 cash back Recommended Services.

Low coolant level faulty coolant temperature sensor PCM or ECU defective. Up to 8 cash back A mechanic would opt for either a pressure test or a dye test to find the source of the leak. You might want to check it out.

Car wont turn all the way off. If the fan is not working even when the car is overheating there might be a wiring issue or a bad connection. If the fan stops running replace that sensor.

The most common reason that your Air Conditioner fan wont turn off is because a stuck relay keeping the circuit closed. Similarly a short circuit or other wiring problem could be preventing the onoff commands from being sent to your fan. It happened on a super HOT summer day in Australia.

GM has issued a technical service bulletin TSB 06-01-39-002B to address problems with the front blower motor. The TSB applies to the following vehicles with automatic temperature control. If the fan doesnt stop running plug that sensor back in and unplug the coolant temp sensor on the thermostat housing.

Check the wirings going to the radiator fan from the control unit or relay. In some cases in cold weather the blower motor may not run or if it does it may not shut off when you turn off the vehicle. Have your voltmeter ready to be sure you are following the correct wire not the ground wire.

If your cooling fans do not stop even after the temperature has been regulated or even when the car has been switched off then it is probably faulty and needs repair. They are usually found under the hood in the relay center. They should be wired together so they both turn on at the same time and when the motor shorts out it can short to power on all the time or not work at all.

If its not the relay your thermostat likely has a shorted cable or needs to be replaced. Maybe the owners manual if available would have the fuserelay layout if the relay box cover is not marked. If the fan still runs after unplugging both sensors then problem might be with radiator fan control module located behind the glove box.

If only the fan is running there may be a broken relay switch preventing the settings you enter on the thermostat from being sent to the fan. Before calling your service technician out to start replacing components check the thermostat settings first. Cooling fan system running non-stop.

Check It Out. You may have shorted out the AC blower resistor that controls the blower speeds. Radiator fan keeps running when engine is off Radiator fan stays on after car is turned off.

If the resistor terminals where the resistors are touched together then it can cause the blower to run with the key in the off position. The coolant leak should be located first and repaired to see if the fan begins working properly. And can make both fans power up if one of them is bad.

I would also check for TSBs related to fan motors and see if there is anything Feb 26 2013 6. Broken Relay Switch or Short Circuit. This component is supplied power all the time and only the switch controls the motor speed.

Repairsurge Online Repair Manuals Replace Bulky Books With Reliable Digital Information. Engines are still hot when you shut them off the fans need to run to continue removing heat from the cooling system. Cooling fans in some vehicles on some occasions will run for a short time after the engine is off.

Just to be clear I disconnected the connector at the top of the fan shroud next to the radiator to make the fan.

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