Question about 1997 Pontiac Bonneville
When turn on the defrost Ac comes on as when turn on the mode AC comes on .Turn off AC and hit auto and raise temperature but no heat. Any ideas would be appreicated
The heater core was plugged and took 8 flushes to clean it . Would clean it would stop again. Have heat now .
Thank you everyone for helping.
Posted on Sep 20, 2008
Mechanical or vacuum operated valve that releases hot coolant into the heater core may be stuck closed. or the heater core may be clogged. hope this helps.
Posted on Sep 17, 2008
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Posted on Jan 02, 2017
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