Problem with heat/air in Chrysler LHS?

The heat turns itself on and flows hot air through the windshield vents. It doesn't matter if I have the system on or not. After a while it will start blowing hot air. Sometimes it quits and then comes back on. I was thinking it may be the Blower Motor Module or the Resistor. What the resistor does I don't know.

I thought that the climate control panel was the problem and I took it out because I would go to press a button to turn it off and it wouldn't. Sometimes I would flick it and it would stop blowing for a while. But like I said, I took it out but it still blows hot air. The AC does work when it is functioning fine.

Any ideas? This time of the year...........I don't need heat...lol.

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  • 1 decade ago
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    The resistor is the blower motor resistor and adjusts the fan speed. Depending on the year of your LHS, you could have either an electrical problem or a simple water valve control problem. Newer LHS as I remember have an electronic control for the heating/cooling section of your HVAC... a loose wire here could cause a problem like you describe. Older LHS use a cable assembly to control the heater control valve (sometimes called a water control valve) In the event that this valve is loose, the cable has come off, or a couple of other possibilities. LHS/Concorde/Intrepid all had AC condensor and line troubles, so make sure your vehicle is up to date on any TSBs or recalls. Good luck.

  • 1 decade ago

    I have a similar situation. The heater control goes dead and the defrosters take over. I think it may have something to do with a digital circut. Does anyone know where the twisted wires going from the heater control go?

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