Question about 2000 Mercury Grand Marquis

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Ac/fan wont kick on

Fan for ac/heat wont kick on tested the fan itself works tested relay its fine, now where do i find the resisor and what does it look like

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  • yadayada
    yadayada May 11, 2010

    You mean the radiator fan?

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  • 63 Answers

There's a fan speed control module on the firewall under the hood. Three screws. Go to your FORD dealer and buy one from their parts department (under $50) and when you have the part in your hand you'll re3cognize the one on the firewall. Takes five minues but the mercury dealer wanted to charge me $600 as the 'Book Rate'. Screw then! It's an easy fix - you can do it with a screwdriver.

Posted on May 26, 2009

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My 1996 Plymouth Neon 2.0 DOHC engine is having a overheating issue. When I run the A/C after about 15 minutes the car willstart to over heat and i have to turn it off. Once I turn it off, the guage will...


your car has two fans one for the motor the other for the ac both fans shooed
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The fan stopped working for the rear AC/heat in our 2003 odyssey. Checked 40amp suqare fuse under hood and it tested ok. Is there a fuse or breaker for the rear fan motor?


The large fuse you checked is for the rear fan blower motor. The fuse you need to check is for the fan motor relays and rear mode control motor. It is fuse No. 3 (7.5A) located in the driver's under dash kick panel fuse box.

If fuse No. 3 is blown and you replace the fuse and it blows immediately, you'll have to check the five relays and the mode control motor all located near the rear A/C unit in the right aft sidewall. Most likely, the mode control doors have become jammed and that is why the fuse blows. The doors shift air from overhead vents (cool) to floor vents (heat).

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After a jumper test on the fans to make sure that they work, you might take a look at your coolant level or temperature sensor. The try testing or replacing any fuses or relays wired into your air conditioning and heating circuit. In my 1998 Buick Regal, the fans never run until the air conditioner or heating fan is turned on. Unfortunately, the A.C. compressor and the cooling fans also kick in when I turn on the heater fan switch. Your best option is to wire the fans to a manual switch on your dash or just drive really fast all the time.

Jan 07, 2011 | 1998 Pontiac Grand Prix

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My coolin fan for my engine wont run? how do i fix it? 98 ford mustang gt


okay heres what causes not to kick in,
1 a bad motor
2 bad tempeture sensor
3 bad/defected fuse or relay.
check the fuses and your fan relay first. swap them around to test is every thing well then test the motor dirtectly, if its fine and works, then tempeture sensor on the engine. remove the harness and put a jumper wire on the prongs and what it kick the fan in. have the ign on with engine off for this. if it works replace the sensor.
hope this help you.

send mr your comments thansk

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My coolant is not working? when driveing it stays cool but as soon as i stop the fan dosnot kick in ad i over heat?


The coolant is working well, because the engine stays cool while driving. The problem is the fan relay, fuse, or the fan itself. Do you have AC? If so, turn it on and you should have instant running of the fan. The normal operation of the fan is: the engine thermal sensor tells the computer that it is getting hot which in turn tells the fan relay to turn on and that is supposed to turn on the fan itself. The fuse protects the high current wire to the fan. Try to turn the fan blades by hand--if stuck or very hard to turn, replace the fan motor. If you can't find the fan relay in the fuse compartment, it may be a solid-state device that is located near the fan motor. Chase the fan wiring back to the relay. Hope this helps!

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2004 starus coupe fans?


If the motor does not sense it is getting too hot, the fans will not come on. When it reaches a certain temp, they will come on. If you are having problems with over heating, and the fans are not coming on, I would suspect the fan temp sensor, or the PCM.

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