Question about 1997 Nissan Sentra

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1997 sentra cooling tempreture sensor problem.

When i turn on my key the radiator fan also start even the engine is cold.

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Its radiator fan.until now my problem still unsolve.

Posted on Oct 11, 2008

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Radiator fan or the heater fan????

Posted on Oct 10, 2008

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2 Answers

I have a 2007 patriot and the radiator cooling fan won't shut off. how do I fix it.


Funny usually it wont come on.
I should ask a question first is it on when the car is cold? just turn the key to on before you start the engine when it is cold and lift the hood to check.

If not then there could be lots of things. Engine always hot, worn water pump or thermostat not working properly, bad control relay.

You can check the control relay which is usually mounted on the lower rad support in between the grill and the rad. You should be able to see the relay it has fins on it.

Mar 06, 2015 | 2007 Jeep Patriot Sport

2 Answers

2004 ford thunderbird< radiator fan keep running


Hi Kevin. Since your fan run even when the engine is cold,my advise is to go direct to the temperature sensor,which actually is the main culprit for causing the confusion to the ECU. Since the temperature sensor does not work correct,the message send to the ECU is wrong - like is sending that the engine is hot - the ECU order the fan to start. Also there is another possibility for the fan relay to remain stuck and leave the fan to work constantly.

Good Luck.

May 05, 2014 | Ford Thunderbird Cars & Trucks

1 Answer

Heater blower fan will not turn off even without key in ignition


"Radiator fan" "Engine Fan" "COOLING FAN WILL NOT TURN OFF"

Click the link below to troubleshoot the problem:---



http://technoanswers.blogspot.com/2012/11/radiator-fan-engine-fan-cooling-fan.html
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These will help.
Thanks.

Dec 14, 2012 | 2005 GMC Envoy

1 Answer

Coolant sensor bad


First replace the thermostat at the end of the hose where it meets the engine. then fill 50/50 start engine if it starts to get normal hot have some one shut the engine off and grab the fan it should be hard to turn if not replace thermostat clutch for fan about 40 dollars don't tip wrong way liquid will run out. Or radiator plugged

Dec 02, 2011 | 1997 Jeep Grand Cherokee

1 Answer

Engine fan turns itself on the moment I turn the ignition key on even when it is very cold. Also the oil gauge shows engine oil as low even when there is enough oil


The engine fan is controlled by a relay and a radiator temperature switch.
Unplug the switch at the radiator, and if the fan still runs, the relay is stuck on.
If you unplug the relay, it should stop. If not, you did not pull correct relay.

Engine oil gauge is for pressure, not level. And pressure should always drop at idle speeds. As long as it is over 40 psi when at higher speeds, then oil should be ok. Normally at idle, the pressure will drop as low as 7 psi.

Jul 11, 2011 | 2001 Audi A4

1 Answer

Hello, i just realised my car is overheating. The temp gauge reaches around 110-115 degress while driving even when stationary. Theres plenty of coolant and i have had a new timing belt and water pump for...


Check the radiator and the cooling fan. open the hood as the engine temperature rises does the fan come on. if not that the problem, Also do this As the car is warming up(from a cold start) near operating temperature, turn off the car, watch out for the fan, engine of key in your pocket fell the radiator is there any hot or cold spot? if there is the radiator is plugged. Also if the radiator isnt plugged new doesnt mean it works, the water pump itself can be faulty. and dont forget the most important device the Thermostat you did timing belt waterpump they should of done thermostat.

May 01, 2011 | 1997 Audi A4

1 Answer

The radiator cooling fan is always on ?


Is your AC on (AC compressor activated)? Try switching that off and see if it still runs.

Feb 24, 2010 | 1995 Toyota Camry

1 Answer

Radiator fans comes on, but car dont start. On a cold engine.


Check the engine relay by tapping it a little . relays sometimes get stuck.It is in the engine compartment at the fusebox.Remove it from the box and clean it. If your car starts. replace the relay.

Feb 02, 2009 | 1994 Mazda 323

2 Answers

AUXILIARY FAN ALWAYS ACTIVATED


if you have your a/c or defrost on the fan will come on as the a/c cuts it on to cool condensor.
if they are not on then you have a relay sticking or someone has rewired the fan

Sep 29, 2008 | 2000 Honda Civic

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