Heater output intermittant, varying
2000 Insight. To get heat out of the heater (once the car is warmed up) you have to crank the temperature control all the way up and then back it off to a lower temperature. It will only maintain that temperautre for a short while. It takes constant fiddling to get the temperature to stay comfortable in the cabin. When the heater quit alltogether we found it had air in the cooling system. We bled it and it returned to as before. The control head has stored a fault code 'K', "air mix door motor". The motor arm travels through its complete arc as you turn the temp control knob up and down and the door itself opens and closes freely. The diagnostic protocol for code K per Alldata is to test the air door motor and then "substitute a known good control head".
Has anyone else come across a problem like this?? Any help would be greatly appreciated!
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