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Engine fan will not turn off - 2008 Honda Pilot

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CHECK COOLANT LEVEL. BUT MOST OF THE TIME IF FAN MOTOR WONT TURN OFF EITHER ENGINE RUNNING HOT OR YOU COULD HAVE A FAULTY FAN RELAY STICKING CLOSED.CHECK ENGINE TEMPERATURE WITH A SCANNER TO MAKE SURE THERMOSTAT NOT PARTIALLY STICKING CLOSED.

Posted on Sep 05, 2010

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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.

Sep 28, 2015 | 2009 Dodge Grand Caravan

1 Answer

Why does my fan turn on after the engine has been turned off?


Fans that cool today's engines are electric. The fans operate when the engine temperature rises above a certain point. When you shut your engine off and are no longer moving, air is not flowing through the radiator, but the engine is still hot. Fan goes on to keep the engine from overheating, it's normal.

Jul 19, 2014 | 2003 Chevrolet Silverado 1500

1 Answer

Engine overheating quickly


there are 2 or 3 fans up front on all A/C equipped cars.
the fan closed to engine (rad rear) turns on parked and idling
all engines will overheat parked, if the fan goes dead.
so are you saying this fan is dead.?
if it dont overheat moving fast then the cooling system is usually good
and then you stop at a traffic light this fan must turn on.
on cars with 3 fans , some stage up, 2 on if too hot. or all 3 on.
the FSM covers this logic clearly.
in the USA car.
the element has 2 fans (some engine options my differ)
the right fan is for A/C
and left fan is for engine cooling, (im looking at alldata.com to see that)

the fan turns on via a relay that he PCM controls
the PCM see the ECT sensor in the engine go to over say 225F and
it closes the relay, and the fan spins at full speed.

fuse 4 runs this relay, in the fuse box
the relay and fuse are named
radiator fan.

Mar 01, 2014 | 2004 Honda Element

1 Answer

Radiator fan


what engine, there are 3 in the USA. gas or diesel.?
the big engine has"?a
"two high pressure lines at hydraulic fan drive." 5.7L engine.
before working on any car, know what engine is there.......????????


the fan just behind the engine rad, comes on, on a dead cold enigine?
CEL (check engine lamp) on key on, then turns off , engine running
and then CEL stays off all the time.????? i no, scan it.
there are 9 DTC errors for the fan alone. scan it.

one one engine, p0692 , tells you , fan2 (high) is stuck on.
got that?
there are 2 fans on the electric fan type engines.
got 2 fans?
and 2 relays
and both are controls all the time by the MFC, module , front , control.

p0480/81 is for the hydraulic, fan...
controlled by 2 modules.... ill wait for engine size ......

Dec 24, 2013 | 2007 Jeep Commander 3.0

2 Answers

Engine cooling fan only works when ac or defrost is on


if engine at long stand still,the engine temperature will rise about 190 degrees the cooling fan suppose to automaticaly turn on when coolant temperature sensor get hot it cause its resistance decrease causing pcm to send power to coolant fan relays and cooling fans, when you turn on AC the cooling fans suppose to turn on to cool down AC CONDENSOR, IF NOT AC WONT WORK COOLING FAN COOLS DOWN REFRIGERANT SO IT CAN RECYCLE THROUGH THE SYSTEM AGAIN.your cooling is suppose to turn on when engine at a sit still if vechicle not moving as coolant temperature rises at a set point the cooling fans will turn on cool down engine.cooling fans dont turn on when you first cold stsrt vechicle unless you have AC SWITCH ON.if cooling fans dont turn on when vechicle at a long stand still or moving along slow traffic.if coolant temperature sensor been replaced and fuses and relays okay have dealership check see if pcm driver circuit working faulty pcm will cause cooling fans not to turn on.

Sep 27, 2012 | 1996 Buick Century

1 Answer

2003 Chevy Impala, running hot. Changed fan shroud because cooling fan wouldn't turn on, switched out fan relays, no check engine light. Cooling fan still will not turn on.


Would turn the key on no need to start it and unplug the ect engine coolant temp sensor. If fans come on then suspect a faulty etc which may not turn on the engine light. Which engine is in the vehicle so I can help locate the ect which is usually by the thermostat housing.

Jun 12, 2011 | 2003 Chevrolet Impala

1 Answer

How did you know when the cooling fans are not working


You may have one conventional belt-driven fan with a thermal clutch and the other electric or, both could be electric on your car.
The cooling fan that operates during non-AC operation (just a running engine) if electric, will be controlled by a thermal switch in the lower radiator tank and may not turn on at all unless the engine is warmed up. The belt-driven fan should be turning at some speed all the time if the engine is running and at much higher speed with a hot engine.
The fan that cools mostly when the AC is operating won't run under normal operation but may turn on in hot weather (or when the engine is under heavier loads) even without the AC operating.
Checking them would require having a warmed-up engine and the AC turned on. Both fans regardless of type should be turning then.

Jun 03, 2011 | 2000 Mercury Cougar

1 Answer

I have a 2002 4x4 Grand Cherokee Laredo 6 cyl. automatic. Engine sounds like the engine is idling high but it is only 700 RPM.at idle. Does this sound like a harmonic balancer?


It may be the radiator fan making all that racket. Usually when the engine is cold, the thermal fan clutch allows more "slip" --- this allows the fan to turn slower than the water pump pulley (less load on the engine). When the fan clutch detects more engine heat, it reduces slippage of the fan clutch and this results in the fan turning "faster". It's actually turning at the same speed as the water pump pulley. The "roaring" noise is the result of the fan pulling in more air through the radiator.

If the noise is present at all times, whether or not the engine is hot or cold, then the fan clutch might be malfunctioning.


I hope this helps.


Have a nice day !!!

Apr 08, 2011 | 2002 Jeep Grand Cherokee

1 Answer

I have a Prelude '97. It overheats. I replaced the readiator, water pump, and one of the fans, but it still overheats when going uphill or when in slow traffic. I've noticed that the fan that is...


will try to help. the fan you replaced, was it the air conditioner fan? if so. then you need to check your primary fan. the one that does come on when the engine reaches operating temperature. make sure by starting engine, let the motor run and the temperature guage reaches the normal operating temperature.if the main engine cooling fan does'nt come on, then you'll need to check the fuse box under the hood. relays are black square plug in's they are marked and will[fan relays] tick when you turn the key on] if main engine fan does not come on when engine overheats, #1 fuse blown #2 relay bad #3 main cooling engine fan bad. note; the air conditioning fan will come on with engine running,when air conditioniing is turned on. when the a/c is turned off, the a/c fan will not be turning. hope this helps and as always, thank you for choosing fixya.com

Nov 28, 2010 | 1997 Honda Prelude

1 Answer

2001 aurora engine heats up when not moving down


Likely the fan(s) not turning on when engine gets hot. Is the check engine light on? Read the code(s) and repair as needed. Check (when cold) the fan(s) for free turning--if seem bound or hard to turn, replace the ailing fan. Check the radiator and reservoir fluid level. Watch the fans as the engine heats up. Feel the radiator area where the upper engine hose connects. It will suddenly turn hot when the thermostat opens. The fan assembly should activate somewhat after. Hopefully, the engine code recognized a defective temp sensor and was replaced.

Aug 11, 2009 | 2001 Oldsmobile Aurora

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