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Old 07-31-2004, 10:51 PM   #1
focusowner
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cooling fan sensor?

Im not sure if anyone has posted this , but just yesterday my car temp. gauge was showing
hot,i mean almost to the red mark.So i pulled over and looked under the hood.I had fluid and
everything else looked ok.Then i noticed my fan wasent working.Does anyone know how
much the sensor would cost ,and where would be the best place to get one?thanks


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Old 08-01-2004, 11:21 AM   #2
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If your temp gauge is working, the temp sensor is probably OK. Depending upon whether you have one or two cooling fans, there are fuses and relays in the Battery Junction Box. At least that's what my '04 manual shows. Of course, the fan motor could be bad also.
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Old 08-01-2004, 04:11 PM   #3
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I'm dealing with this problem right now. My fan wasn't working, only when my a/c was on it would turn on but only on high speed. I pulled out the resistor in the cooling fan and noticed that the plug (harness) that goes into the sensor was all fried up. Thats why my fans werent working. Dont know why this happened, i guess water must have gotten into it. I went to for and ordered a new sensor for 30.00 and as for the harness i just went to a local junk yard and pulled like 3 of them from a focus. Hope this helps. Here are some pics



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Old 08-02-2004, 04:17 PM   #4
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cooling fan sensor

Thanks man.I called my local ford dealership and they said it could be the fan.
Im gonna take a closer look and see if mine is fried too.thanks again.
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Old 03-20-2005, 09:16 PM   #5
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I will answer my question from one of my previous posts. Cylinder head temperature sensor (cht) resistence @70 deg about 29K ohms @ 212 Deg or boiling about 2K ohms. I checked a new one and the one I removed. Unfortunitely this was not the problem. This can be checked on the vehicle before removing. (wish I would have had this info before I bought a new sensor) When I turn the a/c on only one fan turns on. I have checked the resistor and the connection, They are fine. When I jumper 12 volts into the fans one at a time they work fine. Looks like I will have to remove the fans and check all the wires. Anyone got any ideas?
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Old 03-20-2005, 09:23 PM   #6
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I'm glad this subject was brought up. I wanted to know if anyone has tried those adjustable cooling fan kits sold at auto stores? There like $20 and like they say you can adjust the temp at which your fan comes on at. Has anyone tried or used one of these kits? I don't have any problem with over heating but my fan has never came on to my knowledge. I'm sure it has and I was not aware but after almost a year and a half of owning my car I have never heard my fan come on once so I was thinking about getting one of these kits. Thanks for any info.
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Old 03-20-2005, 09:31 PM   #7
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If your temp gauge is not getting over to the hot side, I was wondering why you would want to put in an adjustable kit.??
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Old 03-20-2005, 10:51 PM   #8
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True, I just thought that since my fan was there I might as well use it and the kit was only $20 but I thought about your point also.
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Old 03-21-2005, 06:57 AM   #9
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Quote:
Originally posted by wayne1ca
I will answer my question from one of my previous posts. Cylinder head temperature sensor (cht) resistence @70 deg about 29K ohms @ 212 Deg or boiling about 2K ohms. I checked a new one and the one I removed. Unfortunitely this was not the problem. This can be checked on the vehicle before removing. (wish I would have had this info before I bought a new sensor) When I turn the a/c on only one fan turns on. I have checked the resistor and the connection, They are fine. When I jumper 12 volts into the fans one at a time they work fine. Looks like I will have to remove the fans and check all the wires. Anyone got any ideas?
Relay. Located in battery junction box.
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Old 03-21-2005, 10:49 AM   #10
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I put up a post last week with the same problem you are having. It was tiltled Overheating on Highway. My car almost went into the red in a traffic jam on the highway and I hit the A/C to bring the guage back to the middle. It was also 60 degrees at the time, not your usual hot Florida weather.

Ford had my car for 2 days (still under warranty at the time) and couldn't find any bad senors or relays. They also couldn't recreate the problem and I watched as the car's fan worked properly. I am just waiting for it to happen again and I don't know what to do.
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