1992 chevy lumina 3.1 liter, what causes cold air to blow when heater is on
heater blows cold air in park and idling inany temp. setting., but when driving car blows hot air. What could be the likely causes?
I had a similar problem with a 1992 Lumina Euro 3.1. The problem was the thermostat.
Sounds like it is the thermostat ...
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