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Old 10 Feb 2011, 06:02 pm
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Join Date: Feb 2011
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Default Problem with heater

The heater has stopped blowing air out of the lower setting and the air that is coming out of the upper setting feels extra hot. Is there anything I can check myself before taking it in?
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Old 10 Feb 2011, 06:19 pm
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Default Re: Problem with heater

Welcome to the forum. There's only one blower motor but that goes through a Blower Motor Resistor Block which regulates the speed so it's possible the low speed part of that Resistor block is burnt out. Don't think you can test it or fix just the low speed.

As far as feeling "extra hot", your guess is as good as mine. I did a search but everybody seems to have the exact opposite of what your experiencing ...not hot enough.
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Old 10 Feb 2011, 08:45 pm
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Default Re: Problem with heater

Put a meat thermometer in the vent so you can tell what the temp is.
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Old 11 Feb 2011, 01:26 pm
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Location: Glendale, AZ
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Default Re: Problem with heater

My first thought is that the vacuum switch that operates the blend door that moves the air flow from upper to lower vents is shot, or the blend door is jammed, or the hose is broken or leaking. First place to look is under the hood. Follow the gig, honkin' hose that comes off the brake master cylinder. Eventually, there will be a smaller hose that goes into the car through the firewall. If there are obvious breaks or disconnects, that is likely the problem and you can fix it on the spot. If not, it is, sadly, off to the shop.

Have you had any changes in how the brakes feel? Sometimes the problems can occur together. While that will seem to make no sense at all, there is actually a connection. The brakes will work fine, but seem just a trifle harder or mushier. That's an indication of a vacuum leak like I mentioned in the first paragraph.
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