Air conditioning question 2009 2.4
#1
Air conditioning question 2009 2.4
Help requested. On my 2009 2.4 HHR, AC is not working properly. The compressor clutch is cycling on and off more rapidly than I would think normal and as it cycles, the engine rpms fluctuate quite a bit as if the compressor is lugging the engine. I checked refrigerant and added a little but it is in the normal range.
Vents mostly blowing warm to hot air, but every so often without explanation it will blow cold air. I am suspecting a mixing valve? but not sure. Its weird that sometimes it blows cold air even with the AC controller turned off and just the recirculate mode selected. I have noticed that if I have the temp dial all the way cold and move it anywhere off cold the air will begin to blow warmer to downright hot, but once I do that, the return of dial to cold does nothing, and it will continue to blast hot air.
I know I've come to the right spot for help and ideas. Thanks
Vents mostly blowing warm to hot air, but every so often without explanation it will blow cold air. I am suspecting a mixing valve? but not sure. Its weird that sometimes it blows cold air even with the AC controller turned off and just the recirculate mode selected. I have noticed that if I have the temp dial all the way cold and move it anywhere off cold the air will begin to blow warmer to downright hot, but once I do that, the return of dial to cold does nothing, and it will continue to blast hot air.
I know I've come to the right spot for help and ideas. Thanks
#3
#5
one day I started the car after this was happening and was pleasantly surprised that I had ice cold air. suddenly without touching anything there was a shutter like sound and hot hot hot air was coming out and I could not get it back to cold. Thats why I was wondering about mixer. I don't know where it is, how its controlled, is it fused etc etc
#10
orifice tube blockage?
Intermittent symptoms like you mentioned and good pressures high and low side / freon levels indicates to me a restriction that comes and goes.
Running AC on max and recirculate does compressor stay engaged all the time? What does the coolant temp go to before the radiator fan kicks on? Use the DIC to verify with dash gauge.
Running AC on max and recirculate does compressor stay engaged all the time? What does the coolant temp go to before the radiator fan kicks on? Use the DIC to verify with dash gauge.