I just had my thermostat change among other
things in my heating only works when the car is
driving once the car stops or is in idle position the
heating gets cold any help?
Did you have a shop replace the thermostat? Sounds like coolant level is low, or there is a air pocket in the system.
I have the Chevy Uplander it was doing the same thing I took it to the shop they filled my coolant level and my heater started working properly
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