A/C not blowing cold air and code p0128

2015 CHEVROLET SONIC
63,000 MILES • 1.8L • 4 CYL • 2WD • AUTOMATIC
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DSHEAIRRA
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Hello, my car is having the same issues as someone else did with ac not blowing cold and giving me a p0128 code. what was the issue?
Aug 27, 2019 at 7:10 PM
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ASEMASTER6371
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Good morning,

The 128 code is for a thermostat. It is stuck open and needs to be replaced. It has nothing to do with the A/C issue.

Do you have pressure gauges to give me the pressures?

https://www.2carpros.com/articles/car-air-conditioner-not-working-or-is-weak

Roy
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Aug 28, 2019 at 3:34 AM
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DSHEAIRRA
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Well, there was another guy on here who had the same issue when you restart my battery the A/C blows cold again.
Aug 28, 2019 at 9:17 AM
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ASEMASTER6371
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Did not see it in the history at all.

Roy
Aug 28, 2019 at 9:19 AM
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DSHEAIRRA
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I think this started a new question. I have a thermostat coming. I hope I find out what is causing it.
Aug 28, 2019 at 9:40 AM
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ASEMASTER6371
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Can we start with your exact issue so I can help?

Roy
Aug 28, 2019 at 12:04 PM
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DSHEAIRRA
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Last week my A/C went out with no warning. then a few hours later the p0128 came up on my car. i went to get it checked they said it is'nt really anything to worry about. Then when i reset the battery my A/C works fine then two days it goes out and the same code pops up shortly after.
Aug 28, 2019 at 7:50 PM
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ASEMASTER6371
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The 128 code is for the thermostat in the engine. It is stuck open and the engine is not getting up to normal operating temperature.

I need the high and low side readings of the AC system while it is running.

Roy
Aug 29, 2019 at 2:13 AM