Air conditioning issues
Thread Starter
Heel & Toe
Joined: Jun 2020
Posts: 15
Likes: 3
Air conditioning issues
Recently purchased a 2019 Grand Sport and the air conditioning system intermittently blows warm air instead of cold air. It is more noticeable after having stopped for a few minutes and then taking off from a start. While it is parked, it is blowing cold air but once I take off it blows warm air for 20-30 seconds. Has anybody else experienced this issue?
I have taken it back to the dealership two different times and they keep replacing the expansion valve and that still doesn’t solve the problem.
I have taken it back to the dealership two different times and they keep replacing the expansion valve and that still doesn’t solve the problem.
Last edited by C78353; May 1, 2021 at 03:24 PM.
Burning Brakes
Joined: Nov 2016
Posts: 1,192
Likes: 438
From: San Dimas CA
This is generally a symptom of a low refrigerant charge, but you would have a warning message and the dealer undoubtedly checked with gauges.
So, I would suspect one of the temperature sensors is intermittent. There is an evaporator temp sensor and four duct temperature sensors. These can easily be checked with a scan tool that is able to read HVAC Control Module data.
BTW, do the passenger and driver side both lose cooling?
So, I would suspect one of the temperature sensors is intermittent. There is an evaporator temp sensor and four duct temperature sensors. These can easily be checked with a scan tool that is able to read HVAC Control Module data.
BTW, do the passenger and driver side both lose cooling?
Thread Starter
Heel & Toe
Joined: Jun 2020
Posts: 15
Likes: 3
This is generally a symptom of a low refrigerant charge, but you would have a warning message and the dealer undoubtedly checked with gauges.
So, I would suspect one of the temperature sensors is intermittent. There is an evaporator temp sensor and four duct temperature sensors. These can easily be checked with a scan tool that is able to read HVAC Control Module data.
BTW, do the passenger and driver side both lose cooling?
So, I would suspect one of the temperature sensors is intermittent. There is an evaporator temp sensor and four duct temperature sensors. These can easily be checked with a scan tool that is able to read HVAC Control Module data.
BTW, do the passenger and driver side both lose cooling?
Thanks for the info.
amd yessir, both sides lose cooling.
Burning Brakes
Joined: Oct 2018
Posts: 985
Likes: 761
From: Monticello, AR
2024 C8 of the Year Finalist - Unmodified
I had a different vehicle where the AC blew warm air every time I gave it gas, whether parked or not. When I took my foot off the gas the air turned cold. Turned out to be vacuum leak from a vacuum hose.
