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Old 07-20-2000, 11:01 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
A couple of different things can be wrong. I have seen where the systems loose vacuum and do strange things. There is a vacuum line that is under the battery that loves to break.

Also the heat valve on a 190 is an on/off vacuum valve.

The other thing is a loss of freon.

You need a good tech to give you honest advice.

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Benzmac:
Donnie Drummonds
1991 GMC Syclone
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