1983 Chevy Van no heat

1983 CHEVROLET VAN
10,000 MILES • V8 • 2WD • AUTOMATIC
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MIKE L. HARDY
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please help! My van's heater will only once in a while decide to work. When it does it will come on by itself and only on high. I have replaced the 3 control switches in the dash. Have jumped a hot led to the fan motor instant on. I believe its more on the vacuum side of a problem. No obvious signs of vacuum leaks though. Any thought?
Jan 27, 2009 at 8:55 PM
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JACOBANDNICKOLAS
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Is it the fan motor that doesn't work all of the time? If it only works on high, have you replaced the blower motor resister?

Joe
Feb 15, 2009 at 12:14 PM