Why is my radiator cooling fan not turning off?
2010 Volvo XC60 T6 (59K miles) – Engine cooling fan won’t shut off. The LOWER RIGHT fan is the one that won’t stop while the UPPER LEFT one has stopped. To completely shut off the fan, I disconnected the battery (+). I reconnect the battery, and the fan still runs without turning the car on.
What to do if your computer cooling fan won’t run?
Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.
Why does my car fan keep running after I shut it off?
It is so the car won’t heat soak and blow coolant out the pressure release. Your habit of pulling the fuse may have arced the contacts on the fan relay causing it to weld itself open. Replacing that relay should fix it but it still may run the fan after you shut the car off.
How does the radiator fan on a car work?
The radiator fan module has a ten minute timer in it that allows the fan to come on if one of the temp sensors detects a coolant temp over a specified temperature. This is when you shut off the car and the fan stops, but a minute later is starts up again.
2010 Volvo XC60 T6 (59K miles) – Engine cooling fan won’t shut off. The LOWER RIGHT fan is the one that won’t stop while the UPPER LEFT one has stopped. To completely shut off the fan, I disconnected the battery (+). I reconnect the battery, and the fan still runs without turning the car on.
Replace the cooling fan relay with a new one. A stuck closed relay is the only thing that can operate the cooling fan continuously with the key off. The computer looses power with the key off and the same applies to the coolant temperature sensor. The relay, however, has direct power to one side, the same as a light switch.
It is so the car won’t heat soak and blow coolant out the pressure release. Your habit of pulling the fuse may have arced the contacts on the fan relay causing it to weld itself open. Replacing that relay should fix it but it still may run the fan after you shut the car off.
The radiator fan module has a ten minute timer in it that allows the fan to come on if one of the temp sensors detects a coolant temp over a specified temperature. This is when you shut off the car and the fan stops, but a minute later is starts up again.
What to do when your fan stops running?
When the fan is running, unplug the coolant temp sensor under the distributor. If the fan stops running replace that sensor. If the fan doesn’t stop running, plug that sensor back in and unplug the coolant temp sensor on the thermostat housing. If the fan stops running, replace that sensor.
Why is your radiator fan not running?
The most common causes when a radiator fan is not coming on is broken fuse, bad wirings, bad coolant temperature sensor, bad fan relay, or a faulty radiator fan . Here is a more detailed list of the most common causes of a radiator fan not coming on.
Why does your radiator fan keep going on and off?
Here are some possibilities causing the fan to stay running longer. low coolant level, faulty coolant temperature sensor, PCM or ECU defective. coolant leaks from the water pump, cracked radiator, worn upper or lower radiator hoses, leaky heater core, leaky thermostat housing,
What causes a radiator fan to stop working?
Voltage spikes, high resistances in control circuits, defective vehicle batteries, bad wiring, short circuits, moisture, corrosion, and even excessive vibration due to damage to the fan itself can all cause a fan motor to fail.
Why does radiator fan not working?
- the first thing to check is the fuse. If you don’t know where the…
- check the fan wires. Start by unplugging the wires.
- Temperature Sensor. The temperature sensor determines when the radiator fan comes on by reading the cooling system…
- Coolant Level. Check the coolant level in your engine. The simplest way to do this is to look at the reservoir in the…
Why is the cooling fan on my Volvo not working?
The cooling fan module is supposed to cool the car parts when they get too hot. They do this until the temperature comes down to normal levels. 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.
Which is a symptom of a faulty cooling fan?
The most obvious symptom of a faulty cooling fan system is the increase in warm or hot air in your cabin. A broken cooling fan system will affect the motors that run the blower causing them to supply less fresh air into the cabin of the car.
Why is my coolant fan stuck on high?
I just joined today because I bought my first Truck. It’s an 2013 F150 Screw Lariat Ecoboost. I live in Minnesota and when I started the truck 2 days ago (25 degrees), my coolant fan turned on high right after startup. The heater/defrost and the ac were all turned off.
How to fix a faulty cooling fan module in your Volvo?
The faulty cooling fan module in your Volvo can simply be fixed by replacement. You may need to have a professional mechanic look into your car and give you the correct diagnosis as to why the fan module is not working as it should since the problem could stem from a number of reasons.
What to do if your a / C fan won’t turn off?
At the room thermostat: the FAN-AUTO-OFF or FAN ON/OFF switch on the room thermostat should be checked. 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. at THERMOSTAT WON’T TURN OFF. 2.
What to do if your car cooling fan is faulty?
Test the new unit by switching on the car to see how it works and if it needs more work. Alternatively, you can have a professional mechanic do this for you. TechPlus Automotive has dedicated technicians on call that will replace the cooling fan module in your car as fast as possible.