AC not working

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Aug 12, 2018 | 12:20 PM

kenhartz

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1986 560 SEC

AC not working

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

Aug 12, 2018 | 03:55 PM

pmercury

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You might not be able to restart your ac without Xentry DAS
I worked a lot on my ac and you need to delete all fault codes with DAS to get it start up again
do you see a red dot on your ac dash ?

Aug 12, 2018 | 07:23 PM

kenhartz

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1986 560 SEC

Quote:

Originally Posted by pmercury

You might not be able to restart your ac without Xentry DAS
I worked a lot on my ac and you need to delete all fault codes with DAS to get it start up again
do you see a red dot on your ac dash ?

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

Aug 12, 2018 | 07:26 PM

kenhartz

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1986 560 SEC

Quote:

Originally Posted by pmercury

You might not be able to restart your ac without Xentry DAS
I worked a lot on my ac and you need to delete all fault codes with DAS to get it start up again
do you see a red dot on your ac dash ?

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

Aug 13, 2018 | 12:27 AM

pmercury

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Quote:

Originally Posted by kenhartz

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

the red dot is AC OFF

Aug 13, 2018 | 02:26 AM

kenhartz

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Quote:

Originally Posted by pmercury

the red dot is AC OFF

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.