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Randomly switching from hot air to cool air
What makes this problem better or worse?
Just switch from hot and cool air for no reason
How long has your 1998 Pontiac Bonneville had this problem?
Year
Visitor
Sep 16, 2019
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Low coolant level - - Malfunctioning thermostat - - Heater controls malfunction. **Hands-on** testing is required.
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