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Heating & Cooling 3rd Gen Dodge Ram Heating & Cooling Problems and Questions.


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  #1  
Old 09-28-2010, 08:09 AM
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Post AC only works on high mode.

Hello everyone I have an issue with my AC, It only seems to run when my selector switch is turned to high. It will not work on low or medium. All other functions work fine. Could it just be a bad selector switch? Or do I need to tear into the dash like i've been reading?

Thanks in advance.
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Old 09-28-2010, 08:17 AM
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So no fan at low or medium? If so, sounds like all you have is a bad fan control.
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Old 09-28-2010, 08:32 AM
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Blower motor resistor is shot. They aren't terribly pricey and only take a few minutes to install.
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Old 09-28-2010, 08:43 AM
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Wow! Outstanding response guys! Where is the blower motor resister located, and is it a dealer item or could I find it at a autoparts store? Your help is very much appropriated! Yesterdays temp was 113 !!! in L.A Calif.
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Old 09-28-2010, 08:47 AM
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Yes, you can get them at most local parts stores but I would recommend one from the dealer because the quality is usually better. The resistor is located in the HVAC housing near the blower motor.



1 - SCREW (2) 2 - WIRE HARNESS CONNECTOR 3 - HVAC HOUSING 4 - BLOWER MOTOR RESISTOR 5 - BLOWER MOTOR
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Old 09-28-2010, 09:09 AM
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RAM TECH you the MAN. Ill jump on it asap before it starts warming up. Ill keep you posted on outcome. The diagram is going to help alot. Thanks again, you too MADDOG
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Old 09-28-2010, 09:13 AM
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I almost forgot to mention to inspect the electrical connector at the resistor and make sure it hasn't gotten hot and tried to melt.
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Old 09-28-2010, 09:35 AM
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Will do. Any idea why resistor might of gone out? ( just trying to anticipate further repairs )
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Old 09-28-2010, 09:37 AM
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Yeah, just normal wear and tear. It's not an uncommon failure on older vehicles.
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Old 09-30-2010, 06:22 AM
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Randy, I printed out your diagram... its safely folded in my center console. I probably wont be able to get to it till next week cuz of the newbaby N all Thats also around th e time i'll b geting sum shut eye too I will definitely keep you update thanks again.
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