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Anonymous Poster
wisernwiser@comcast.net
Feb 4, 2007, 7:50 AM
Post #1 of 6
(3572 views)
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Heater fan switch
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2003 Jeep Liberty Sport. My Heater fan switch will only work on the high setting. No lower speeds will work. How can I fix this myself with out a service call to my dealer and a large bill ?
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Guest
Anonymous Poster
harleydadcar@yahoo.com
Feb 4, 2007, 11:50 AM
Post #2 of 6
(3568 views)
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Re: Heater fan switch
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blower motor resistor try replacing that
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carminejg3
User
Feb 6, 2007, 9:00 AM
Post #3 of 6
(3558 views)
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Re: Heater fan switch
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I have the same issue in my car... well I did. The blower would only work on high speed, but recently the blower stopped working and once in a while if you hit a nice size bump, the blower kicks in but then shorty doesn't work. I've been searching for a heater relay switch, but will give changing the resister a shot first.
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tut2261
User
Feb 7, 2007, 12:53 AM
Post #4 of 6
(3553 views)
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Re: Heater fan switch
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If it only works in the highest setting the resistance coils in the blower motor resistor have failed. The highest setting still runs through the resistor, but is isolated on it's own circuit.
If the Blower is working intermitantly, it could be the motor. A loose connection or burnt wires would be a good prelem inspection. However the resistor would be a cheap guess.
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carminejg3
User
Feb 7, 2007, 8:42 AM
Post #5 of 6
(3548 views)
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Re: Heater fan switch
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Thanks, Tut2261.
Mine actually ran for about 2-3 years on high only. Then recently went caput altogether. Now every once in a while yo hear it trying to kick back on, but no go. So like you mentioned I'm going to try out the resistor first since its under $40 and a blower could be a few hundred, but first I'll open up the unit and make sure the resistor is plugged in could just be a loose connection...but thats doubtful. I'm just hoping that the resistor went totally and thats why it doesn't work.
Do I have to discharge the resistor first or does it most likly drop the charge?
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tut2261
User
Feb 7, 2007, 4:57 PM
Post #6 of 6
(3544 views)
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Re: Heater fan switch
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There is not charge on the resistor, Just unplug and plug in the new one. Just be sure the key is off while you working on the wiring to insure you do not ground out a power wire.
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