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Old 12-08-2013, 02:13 PM   #1
cookmeup272
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2000 Ford Focus Heater Fan Problem

The other day when I went to drive my car, the fan speed selector was stuck on 4. I had to use a little bit of force to get it to move, but once it did move the fan stopped working. Now that it is winter, it's pretty dangerous driving around without being able to defrost my front windshield. Already replaced the Thermal Resistor on the Resistor pack. Checked blower fuse under hood, that's good. Is my problem pointing to the cables?


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Old 12-08-2013, 03:02 PM   #2
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I would guess it's your speed selector switch. The thermistor and the cables have nothing to do with a stuck selector switch
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Old 12-08-2013, 04:18 PM   #3
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When an electrical switch "sticks", then doesn't work once it moves, you can be about 99% sure that the problem lies right there.

It could have simply broke mechanically, or the initial cause could have been from excessive heat from poor contact in the switch melting some plastic parts inside.

Doesn't really matter now, that's just the most likely problem & first place to look in fixing your issue.

luck!
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Old 12-08-2013, 09:20 PM   #4
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Quote:
Originally Posted by sailor View Post
When an electrical switch "sticks", then doesn't work once it moves, you can be about 99% sure that the problem lies right there.

It could have simply broke mechanically, or the initial cause could have been from excessive heat from poor contact in the switch melting some plastic parts inside.

Doesn't really matter now, that's just the most likely problem & first place to look in fixing your issue.

luck!

^^ agree.
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Old 12-09-2013, 10:17 AM   #5
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Never had this with the Focus, but I replace the fan switch on the E250 about once a year. Cheap plastic construction + too much heat = melted switch.

Yes, fix ASAP. No defrost is bad in cold climates.
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Old 12-09-2013, 11:54 AM   #6
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Originally Posted by Leora83 View Post
Never had this with the Focus, but I replace the fan switch on the E250 about once a year. Cheap plastic construction + too much heat = melted switch.
Leora83, if you are having to replace your fan switch that often, you might consider installing a relay in the high speed circuit so that the switch does not have to carry the high speed fan current. It is likely that the high speed current is what is burning out your switch, but more relays could be added if necessary to eliminate all of the fan current from going through the switch. Just a thought....

I think this diagram is for the E250.
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