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Old 10-29-2010, 10:08 AM   #1
frankie420
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Heater not working at all!

I have a 2001 Ford Focus ZX3 (119,000 miles), Here's what I know about the problem:

- The heating/ac system isn't working on any blower setting (1,2,3, or 4)

- After the car warms up when I drive fast warm air will leak out eventually warming the car slightly.

- The fuse is blown for the heating/ac system, replaced fuse, blew when I turned on the car.

- Replaced the Blower Motor Switch, didn't work.

It's getting to be winter and I'd like to figure this out and maybe fix it myself before the snow flies. My girlfriend (it's her car) and I appreciate any help. Thanks you!!!


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Old 10-29-2010, 10:18 AM   #2
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Quote:
Originally Posted by frankie420 View Post
I have a 2001 Ford Focus ZX3 (119,000 miles), Here's what I know about the problem:

- The heating/ac system isn't working on any blower setting (1,2,3, or 4)

- After the car warms up when I drive fast warm air will leak out eventually warming the car slightly.

- The fuse is blown for the heating/ac system, replaced fuse, blew when I turned on the car.

- Replaced the Blower Motor Switch, didn't work.

It's getting to be winter and I'd like to figure this out and maybe fix it myself before the snow flies. My girlfriend (it's her car) and I appreciate any help. Thanks you!!!
Well it looks like you have a short which would cause your blower settings not workings. the warm air that blows through when driving is just from your engine bay it happens on all cars. unless you switch it over to the cold side.
If its definitly a short you might wanna take it somewhere to get it looked at cause wire shorts are a bitch to find.
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Old 10-29-2010, 10:29 AM   #3
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Sounds like the resistor went bad. No resistance when applying power will blow thr fuse every time.
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Old 10-29-2010, 10:41 AM   #4
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Originally Posted by Notorious0ne View Post
Well it looks like you have a short which would cause your blower settings not workings. the warm air that blows through when driving is just from your engine bay it happens on all cars. unless you switch it over to the cold side.
If its definitly a short you might wanna take it somewhere to get it looked at cause wire shorts are a bitch to find.
Is there a way to diagnose this myself? Would it be specific wires that run from the heater core to the "Heater Panel"? How would I figure out what wire is shorted out?

Just a little about my mechanical history...with direction I can usually fix things...I've replaced all the stereo equipment...removed door panels...replaced headlight bulbs. Is there a chance I can fix this?
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Old 10-29-2010, 10:42 AM   #5
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Sounds like the resistor went bad. No resistance when applying power will blow thr fuse every time.
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I'm going to NAPA to get the replacement part (Blower Resister) ...I'll post when I fix it up and see what happens.
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Old 10-29-2010, 11:37 AM   #6
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Remove everything from.the glove box, squeeze the sides to bring it down farther, there will be a bright blue box looking thing with wires on the right IIRC . (if its been replaced before it will be black) remove connector and unbolt with 8mm . It's a Ford only part so you need to go to a Ford parts department to get it . about 15-25
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Old 10-29-2010, 11:44 AM   #7
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Left side
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http://4.bp.blogspot.com/_edmURbisrb...0/resistor.jpg
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Old 10-29-2010, 11:50 AM   #8
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I don't know what the values are for voltage but if you have a multimeter you can test the resistance. If 12v getting through then there isn't any.

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Old 10-29-2010, 12:36 PM   #9
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shouldn't there be 12 volts available for fan speed 4?
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Old 10-29-2010, 01:16 PM   #10
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Im not sure, the purpose of the resistor pack is to lower the voltage before it gets to certain components so they dont fry. i would need the schematic to be sure.
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