Question about 1992 Buick Century

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When I turn the key the radiator fan turns but will not stay. It also will not come on when the engine is hot.

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If it is an electric fan unplug and jump 12 volts to positve teminal in connector and ground the other. If fan checks out okey ,warm up coolant with a volt meter on coolant temp switch in radiator , set to continuity and see if it closes which would bring fan on. If no sw in rad get back to me

Posted on Sep 28, 2009

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The fan is controlled by a temperature switch.Check to ensure the switch is functioning.Replace this switch if defective.Disconnect the fan wires and supply 12 volts to check fan function

Posted on Sep 28, 2009

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4743micheal
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SOURCE: Radiator Fan Stays On

A simple test would involve disconnecting the fan switch while the fan is on. If the fan then stops the switch has failed. If the fan continues to run remove the relay , if the fan then stops the relay has failed.
Various inputs/outputs at the relay should be confirmed to be 100% certain something strange isn't going on.
Above all be careful of the fan itself , if it's running obviously but if it's not it could start during repair

Posted on Mar 01, 2010

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2 Answers

Why would the engine temperature remain in the normal range for a couple of hours and then overheats when idling?


Check to make sure both of the electric fans are working. Your car has two cooling fans. As the engine begins to warm up one of the fans will come on. When the engine gets near or above normal temp the other fan will cut on. When you are driving, there is enough air moving through the radiator to keep the engine within normal range. When the car is stopped the fans are needed to draw enough air through the radiator. When the engine is hot and running, open the hood and look to see if both fans are turning. Keep your hands away. Just look don't touch. If neither fan is spinning, or if only one is spinning, you probably need to install a new fan assembly. But check for blown fuses or relays. Have someone check to make sure power is being sent to the fans when they should be spinning.

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2002 ford windstar sel overheating


first check coolant level in radiator coolant level sound low.if coolant overflow jug empty.coolant sysyem low, when add coolant to coolant overflow jug coolant level should stay at full cold mark.if coolant level okay,engine overheat while sitting or moving in slow traffic either coolant fan relay or fuse could be bad.or engine coolant temperature sensor could be bad. coolant sensor turn on cooling fan at certain temperature.hot wire check to make sure cooling fan motor not bad or short in wires.if all is good have pcm check it controls fan relay to through the coolant temperature sensor signal when coolant get hot.

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I have a 2006 PT cruiser and the cooling fan will not turn off


on a lot of vehicles, the electric fan cooling the radiator will stay on when the car is turned off. this is normal and happens when the senser tells the fan that the engine is hot and needs cooling. if it stays on for prolonged periods, there is a problem somewhere. should cool and turn off automatically. R

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Fan keeps running after car is turned off? Sensor or relay problem??


Some cars are designed to have the fan run for a few minutes after you turn the car off. But if doesn't stop until the battery drains, then it might be a faulty switch or temperature sensor.

Or, if the fan stays running when the engine and radiator are cool you have a very cheap problem: The fan thermostat is stuck closed. A new thermostat will fix the problem--the hardest part of replacing it is finding it. Follow the wires from the fan to the switch--it is usually on the bottom tank of the radiator. Drain the radiator first and save the coolant to put back in after you replace the thermostat. NEVER OPEN A HOT RADIATOR.

If that wasn't it then check the following:
  • Check to see that your coolant level is correct. Top up as necessary.
  • Lay your hand on the radiator (with the engine off) and feel if it is as hot at the top as it is at the bottom. If not, your radiator may be clogged and need flushed or replaced. (Flushing is cheap. Replacing the radiator isn't)
  • Do you get heat from the heater? Leave it turned on high and see if your fan stays running the next time. If it takes care of the problem that could mean you have a kinked radiator hose.

Hope this helped (remember comment and rated this).

Mar 24, 2011 | 2003 Audi A4 Cabriolet

2 Answers

When I turn my car off the air conditioner still runs-I needed a jump the other day because it ran all night and wore the battery down.


OK, if the relay for the A/C fan is bad, then the radiator's fan will keep running after turning off the ignition. Also, if the fan for ventilation of the A/C in the cabin stays on after the ignition is turned off, the relay for that is bad.

Good luck on this repair.

Sep 20, 2010 | 2001 Buick Century

3 Answers

Whay does my radiator fan stay on whaen i turn the car off


It stays on to continue cooling the contents of the radiator, which remain hot even after you turn your car off. When the coolant is cooled, the fan will turn off.

Aug 07, 2010 | 2001 Nissan Altima

1 Answer

Cooling fan stays on while engine is on and its not the relay, what could it be?


IF COOLING FAN STAYS ON WHILE CAR IDLING AND DONT TURN OFF YOUR ENGINE IS RUNNING A LITTLE HOT.YOU COULD PARTIALLY CLOGGED RADIATOR OR ENGINE BLOCK PARTIALLY STOPPED UP ALSO THE THERMOSTAT NOT OPEN ALL THE WAY.HAVE VECHICLE SCANNED TO SEE WHAT COOLANT TEMPERATURE IS IF HOT.HAVE RADIATOR SHOP PRESSURE TEST COOLANT SYSTEM AND FLUSH OUT RADIATOR AND ENGINE BLOCK CHANGE THERMOSTAT.

May 22, 2010 | 2001 Dodge Grand Caravan

1 Answer

Fan blower stays on after i shut car off i unplug the wire for it so it does shut off and when i need air i plug it back it and my radio stays on after i shut car off and take key out...my radio is...


Some cars are designed to have the fan run for a few minutes after you turn the car off. But if doesn't stop until the battery drains, then it might be a faulty switch or temperature sensor.

Or, if the fan stays running when the engine and radiator are cool you have a very cheap problem: The fan thermostat is stuck closed. A new thermostat will fix the problem--the hardest part of replacing it is finding it. Follow the wires from the fan to the switch--it is usually on the bottom tank of the radiator. Drain the radiator first and save the coolant to put back in after you replace the thermostat. NEVER OPEN A HOT RADIATOR.

If that wasn't it then check the following:
  • Check to see that your coolant level is correct. Top up as necessary.
  • Lay your hand on the radiator (with the engine off) and feel if it is as hot at the top as it is at the bottom. If not, your radiator may be clogged and need flushed or replaced. (Flushing is cheap. Replacing the radiator isn't)
  • Do you get heat from the heater? Leave it turned on high and see if your fan stays running the next time. If it takes care of the problem that could mean you have a kinked radiator hose.

Hope this helped (remember comment and rated this).

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2 Answers

Both radiator cooling fans won't turn on vehicle overheats


The fans come on only when hot or the AC is on. There are many fuses that have to be good for it to work. The fan relay should have 2 pins hot with the key on, The other 2 should be ground. with the key off one should be hot and the other can then be ground the other pins that are ground one of them is the fan. the other becomes ground when the computer turns the fans on. If you don't have a pin thats hot at the relay all the time then theres a blown fuse or even the power wire from the battery at the battery

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Coolant fan not working- engine staying too hot


The fan might not be working because the sensor in the radiator could be bad.

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