Question about 1992 Honda Prelude

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My engine cooling fan runs even when the engine is turned off-Do you think it is as simple as changing the relay? Much appreciated, Joe B-

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The engine fan circuit is separate from the ignition system and it is perfectly normal for the fan to sometimes be off while the engine is on and sometimes on while the engine is off. It should turn itself off independently. If it runs 24 hours a day without starting the engine then the relay or water temperature sensor will need replacing.

Posted on Nov 13, 2009

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2 Answers

When I turn the engine off the engine cooling fan stays on and does not shut off


depending on the engine temperature the fan is supposed to remain on after you turn the engine off, until the engine reaches a preset cooler temperature. when it reaches cooler temperature usually within 5 minutes or so it should cut off... if you cut it off and it is running 30 minutes later.. then there is a problem with the fan relay or temperature sending unit.

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Why does my fan keep running in my 2003 Volvo S 60 after the car is off?


It can be faulty fan relay.The relay is not turning the system off.Or its wire short issue.Even with ignition off ,the fan relay is getting power so its not letting the fan to turn off.Bypass the fan control relay and see if still the fan works with ignition off or not.

For more troubleshooting check the link below:------

Cooling Fan Stays ON with Ignition Off?

http://whatisbyme.blogspot.in/2012/07/cooling-fan-stays-on-with-ignition-off.html
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http://technoanswers.blogspot.in/2012/02/cooling-fan-relays-location-on-1998.html
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http://schematicsdiagram.blogspot.com/2011/12/dic-says-cooling-fan-fault.html
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Heater fan and headlights will not turn off with ignition off?


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Where Is Radiator Fan relay and Fuse Located?

http://schematicsdiagram.blogspot.com/2011/12/where-is-radiator-fan-relay-and-fuse.html

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These will help.
Thanks.

Nov 28, 2012 | Volvo S60 Cars & Trucks

1 Answer

Where are the cooling fan relays located?


This may not help, but it looks like two fan relays are in a box on the passenger side of the engine compartment. The info should be in the owners manual.
Let me know if you don't find it.

Aug 17, 2012 | Cars & Trucks

2 Answers

I changed the thermostat and temp sensor and now the car runs hot and the fan will not kick on. even if i over ride it with defrost!!


I think yu have air trapped in the system. You need to burp the air. Try leaving the cap loose and running till it warms up, then tighten the cap and keep the reservoir full.

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2 Answers

Cooling fan won't shut off


Hi!
Check the cooling fan Relay located on the engine compartment Fuse n Relay Box, it is probably stuck ON. If fan stops when relay is removed, replace relay.
Note: Some vehicles are equipped with automatic cooling fans where the cooling fan can come on when engine is hot, even if the key is OFF or not in the Ignition, check your owners manual.
Good Luck! A HELPFUL - 4 THUMBS - rating for this solution would be greatly appreciated. Thank you for using FixYa.

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1 Answer

1999 Dodge caravan 3.3L motor. problem: Cooling


the fan should only come on if a/c high pressure is above 200-250psi. or th eeng is HOT +220f... the relay I think is located at the lower left corner of core support, and common to fail.

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1 Answer

Cooling fans only run when gear is in park


Looking at a wiring diagram I see two relay's that control the cooling fans (has two ) High speed cooling fan relay , low speed cooling fan relay . Both relays are controlled by the PCM - engine computer . Your best bet , have it checked for DTC'S - diagnostic trouble codes . Could have control circuit problems .There are videos on youtube test relay controlled circuits . How to test at the relay base (where relay plugs into ) Test power an grounds an control . Do you know how the cooling fans work ? Coolant temp. sensor inputs temp to PCM . When coolant temp reach's 200 to 220 , the PCM will energize the relay's low speed then high if temp fails to come down . Can check this data on a good scan tool . Can even turn the fans on with a good scan tool .

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1 Answer

Vw cooling fan problem?


There is a relay located near the top or side of rad saddle or fan shroud, trace the wiring harness from the fans to this relay sounds like the relay is fused together or shorted out, or as simple as checking your temperature control setting inside, if you have a/c and have the fan set to any position other than off, and the hot/cold dial is in the blue those fans will always be running when engine is. Easy to check this, just have the car running and turn off your fan or turn your temp selector to max hot. If the fan still runs even when the engine is cold then revert to my first check on the fan relay.

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2 Answers

95 grand am radiator fan only runs with AC on


Cooling Fan Temp Sensor is the First thing You Check (with what you have described) Cooling Fan Should ALways come On When The A/C is turned On as A/C Adds A Load to Engine, If Temp Sensor is Faulty it Will Not Give GROUND Signal to ECM >For COOLING FAN >RELAY to Give ground and turn ON The Fan.
There ARE 2 temp Sensors that Serve Different Purposes 1 is for Dash READING GAGE & Or TEMP LIGHT the Other is For ECM or Fan Relay (SAME Thing) you Said>""can disconnect the sensor and fan continues to run" < This Leads me to think you Changed the Wrong One. Not Questioning your Skills Just Here to Help.
TEMP SENSOR FOR 3.1L V6 is Located upper RH rear of engine compartment, near exhaust system. Temp SENSOR for 2.3L Engine is Located in LH rear of engine compartment.
I Hope this Helps Lead you to a NON-OVERHEATING Pontiac.
Good Luck and Have A Great Evening. rejakwilson

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1 Answer

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The fans only run when the engine reaches approxminatly 235 degrees F. on the guage that is near the end of scale just before guage show "HOT" I don't think you have a problem, allot of folks out there don't know about this.

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