Heat goes away after driving
I have now replaced the thermostat twice, the heater core, the water pump,
and the radiator. I still get a lot of heat for about 10 minutes then as you
drive, it gets cold and stays cold. If the vehicle is turned off (then allowed to
cool) I get heat again.
I have also checked the blend door and blend door actuator, and those seem
to be functional. No leaks/antifreeze when the system is closed. Only
thought is I haven't properly bled the system of air. I am at a loss, can
anyone help?