AC stops blowing cold and temperature gauge quits working at the same time

KATYC305

MEMBER
2008 CHEVROLET MALIBU
2.4L
4 CYL
2WD
AUTOMATIC
109,000 MILES

While driving or just starting the car the AC will stop blowing cold and then the temperature gauge stops working. We have replaced the thermostat and the ECT sensor. After changing the ECT sensor it starting working for about 60 miles then it did the same thing. What could be going on?

Sunday, June 16th, 2019 AT 6:26 PM

5 Replies

ASEMASTER6371

MECHANIC
52,796 POSTS

Good morning,

When you replaced the ECT, did the car start blowing cold air again?

https://www.2carpros.com/articles/low-or-no-air-flow-from-vents

Can you tell me the high and low side pressure readings of the AC system?

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

Are there any codes set?

Roy

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Monday, June 17th, 2019 AT 3:15 AM

KATYC305

MEMBER
3 POSTS

Yes.

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Tuesday, June 18th, 2019 AT 10:22 AM

ASEMASTER6371

MECHANIC
52,796 POSTS

Yes to what?

Roy

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Tuesday, June 18th, 2019 AT 11:50 AM

KATYC305

MEMBER
3 POSTS

Sorry. Yes, when we changed the ECT and thermostat the AC started blowing cold again. It stayed on for awhile then after the car was sitting for awhile when I got back in it to leave the temperature gauge wouldn't work and the AC was blowing hot again and the fans kicked on instantly.

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Tuesday, June 18th, 2019 AT 1:12 PM

ASEMASTER6371