When Heater set to auto, and temperature set to 79 deg, fan is at slow speed. If you adjust the temp either up or down, the fan works it's way up to high. Outside temp is 50 deg. I just got this car back after having the head gasket replaced, due to overheating. Mechanic response was to tell me to not use auto setting.
what happens if you start at low and work your way up one degree at a time, pausing for 20 seconds each degree?
