my AC stopped working sometime this past fall. I finally got around to attempting to fix it. In checking the internal diagnostics there was a fault code for a evaporator temperature sensor. I replace the sensor, now there’s no fault codes, but the system still blows warm air. I hooked up my AC manifold gauges and the low side is running very high approximately 100 to 120 pounds, the high side is running At about 110 pounds. I believe I have a clutchless compressor, and it is spinning. My thought is that the compressor is not compressing. Any thoughts? Thanks

I have an icarsoft MBII reader. I think I was able to clear the codes, but now that I think, I may have been having trouble reading the diagnostic codes. I think I was able to monitor/stream values. The MB II is supposed to read the values, but maybe I’m doing something wrong?? I’ll have to try again and see. I cleared the codes in the hidden menus for the HVAC diagnostics in the HVAC control console.

That seems to make sense, as it’s highly unlikely that multiple parts fail simultaneously, but who knows. I would love to fix this ASAP, as the weather here in NJ has been brutally humid!

thanks
ken

also, I don’t remember seeing a red dot on the dash. But I’ll look

the ac off was lit prior to installation of the evaporator temp sensor, once code was cleared (through the onboard diagnostics) the light went out after restarting the car. But no, ac yet.

i just read what I replied, I had a typo, ac off light was lit, then after after installation of sensor, I cleared code, light went out, and no more codes. But I think you got the jist of what I was saying by your response. Yeah, I’m thinking it’s not good. I’m thinking compressor, but given this is one of the clutchless ones, I thought maybe some valve on it or something?? Or am I just doing something stupid and not realizing??? Thanks

Mia that the star diagnostic program? Is the carsoft MB II not sufficient?? Thanks

gotcha, I’ll sniff around and see what I can find