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Radiator and ac fan problems

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Old Mar 22, 2011 | 12:14 PM
  #1  
Mavlude's Avatar
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From: GA
Default Radiator and ac fan problems

The car's a 92 prelude s with an f22b dohc

The radiator fan refuses to come on so i jumped the thermo switch which makes the fan run while the car is off but it doesn't do anything while the car is running. Anybody know why jumping it wouldn't work with the car running?

also, neither of the fans will come on with the ac switch and the compressor doesn't come on either. I repaired the climate control a few months ago and it worked fine so i think it has something to do with the engine cooling system and the other fan not running

oh and both of the fans are in good working order and will run if i jump them to the battery and the fuses are good as well, any help would be much appreciated
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Old Mar 22, 2011 | 12:20 PM
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Phildo916's Avatar
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From: Ca, US
Default Re: Radiator and ac fan problems

I recently had to change my radiator fan relay to get my fans up and cooling again. Test the relay for the fans and go from there.
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Old Mar 22, 2011 | 12:30 PM
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From: GA
Default Re: Radiator and ac fan problems

yeah i tried 4 different relays and still its till the same. I'm just lost because i cant get the fans to work while the car is running but its fine when its off
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Old Mar 22, 2011 | 12:41 PM
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Default Re: Radiator and ac fan problems

Ahh, there are two temperature sensors the system uses. One that turns the fans on when the car is running, and another sensor runs the fans when the car is off. The sensor on the thermostat housing is the one that controls the fans when the car is on. The other sensor is on the return line hose on the left front of the engine.

http://img.photobucket.com/albums/v2.../IMG_22272.jpg

Replace ECT switch B as shown on picture at the above address.
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Old Mar 22, 2011 | 12:57 PM
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From: GA
Default Re: Radiator and ac fan problems

ahh, i didn't know there were two sensors for it. I just checked the second one and it didn't have any wires going to it so i think its safe to assume that was the culprit. Thanks for the help!
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