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Old 05-18-2008, 06:58 PM   #1
FociBoi121
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Exclamation HELP! Cooling Fan Problems

ok so live in FL
i rarely use the A/C
WELL stuck in traffic i decide its A/C time i jus drove by a digital sign that says 92 degress be4 the jam whew

my car starts overheating so i speed up after getting out of traffic (the radiator needs air ventilation to cool after i turn a/c off )

Basically i knew my fans arent working
car is fine for driving and idling just not idling with A/C

what should i check for?
connections?
a relay?
anything else?


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Old 05-18-2008, 09:28 PM   #2
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I would check your electrical connections to the Fan....also you might check your thermostat on the radiator.... supposedly it takes a much higher temp. for the stock ones to start working, so must people just swap them out.

^^^Those are just a shot in the dark,

But did it sound like your fan was running?
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Old 05-18-2008, 09:29 PM   #3
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Typically the low speed fan stops working but the high speed fans will work with the AC on. The fans are forced on when the AC switch is on. I would check all the wiring and harnesses connected to the fans. Many foci have problems with the harnesses burning out.
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Old 05-19-2008, 01:25 AM   #4
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I was going to mention that the fans are running when the AC is on automatically. It helps get extra flow to the condenser. Right now, if you don't have the A/C on, it doesn't overheat, but it does when the A/C is on? Is either fan working?

I would check the wiring first, as if neither fan is working, that may be the problem. After that, check the fuse/relay. Hopefully it is something simple like that. I don't think it would be the temp sensor, as if it is overheating (like the gauge is reading way off to the right), the car knows what temperature it is. Because, as far as I know, the temp sensor for the fans and the temp gauge are the same...and the actual gauge in the car doesn't really read the temperature. Instead, it gets a signal from the ECU saying whether or not the car is cold/warm/hot. Now, if the car is getting too hot, the temperature gauge goes was off to the right by having the computer simply tell it to. I'm pretty sure that is the way that it's set up. I think I remember reading that in my Haynes manual while I was bored one day.

I don't think it would be the thermostat though, at least, not unless the fans are actually working and the car is still overheating.
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Old 05-19-2008, 03:36 PM   #5
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I tested the fans.. not working when the a/c is on at any speed
theres no overheating issues at any other time, just that the car will overheat when trying to run the a/c at a full stop
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Old 04-01-2010, 04:38 PM   #6
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Quote:
Originally Posted by FociBoi121 View Post
I tested the fans.. not working when the a/c is on at any speed
theres no overheating issues at any other time, just that the car will overheat when trying to run the a/c at a full stop
did you find out what the prob was? my 03 is overheating and the fans DO NOT TURN ON when the a/c is on... the fans are working with direct power to them. all fuses look good to. i see alot of issues with the thero but this has nothing to do woth the fans ( i think)
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Old 04-06-2010, 12:06 AM   #7
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Check your relays. I haven't looked at the wiring diagram in a while, but I think if your A/C light (the button on the dash) is turned one, the fan *should* be running....
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Old 04-06-2010, 01:19 PM   #8
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^^ will do thnx.. the fans are comming on right about when the car is overheated in which case they do not cool it down enough @ that point. still no fan on while the ac is running. ann blowing hot air out the a/c but i am more worried about the over heat issue
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Old 04-06-2010, 10:39 PM   #9
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Posted via FF M obileCheck the fan resistor threads - lots of info
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Old 04-14-2010, 03:27 PM   #10
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okay, i need to know how to check and where the a/c switch control sensor and coolant fan temp sensor are located.. also which are the relays in the box in the engine compartment located for the a/c and fan unit? sorry for all the question just having hell with this focus
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