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Old 11-21-2000, 10:00 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
Most of it is vacuum. You have an electronic control unit that sends electric signals to a vacuum block that opens and closes the doors in the heater box. I would think that you have a fault in the vacuum system. I would test the VOLUME of vacuum coming from the booster hose. I have seen the line clog up from time to time (hint)>

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Benzmac:
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