AC issues
Thread Starter
Intermediate
Joined: Apr 2015
Posts: 33
Likes: 1
From: North Tonawanda NY
AC issues
Three times my AC/Heater/Fan controls did not work at all. After the first time I turned off the car and everything worked, the same with the second time.
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
Drifting
Joined: Sep 2014
Posts: 1,267
Likes: 119
From: Bellevue WA
that sucks. I haven't heard others here on the forum describing that problem. I have a 2016 and never experienced that.
Sounds like taking it into the dealer is the best option as it isn't normal...
Sounds like taking it into the dealer is the best option as it isn't normal...
Burning Brakes
Joined: Nov 2001
Posts: 973
Likes: 221
From: Lake Norman NC
Three times my AC/Heater/Fan controls did not work at all. After the first time I turned off the car and everything worked, the same with the second time.
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
. No codes, I'm thinking software glitch from reading current tempt in cabin are faulty temp switch. 4 months now and hotter temps all is good, Must be when all the moons line up. Did not go to dealer in hope a code would eventually show up, nowadays the Tech would be lost without a fault code.
Racer
Joined: Jan 2015
Posts: 388
Likes: 41
C7 of Year Finalist (performance mods) 2019
Three times my AC/Heater/Fan controls did not work at all. After the first time I turned off the car and everything worked, the same with the second time.
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
However, yesterday coming back from Corvettes of Carlisle the system did not reset. Not a fun ride driving for 6 hours coming home.
The first time it quit I thought it was a fuse. Could it be a faulty relay not resetting?
Pulled it out of the garage today, and it works again.
Have an appointment with my dealership tomorrow. My new Coupe just turned 2700 miles. Not a problem I thought I would have
Thread Starter
Intermediate
Joined: Apr 2015
Posts: 33
Likes: 1
From: North Tonawanda NY
AC/ Heater Control Issue Resolved
Verified HVAC Locks UP
Dealership found multiple DTC'S in system.
Found PIT5383A Matching DTC'S
Reprogrammed HVAC Module Code 9938F. Verified OK
GM is aware of this problem
My baby is cooling like a refrigerator again!
Dealership found multiple DTC'S in system.
Found PIT5383A Matching DTC'S
Reprogrammed HVAC Module Code 9938F. Verified OK
GM is aware of this problem
My baby is cooling like a refrigerator again!
Burning Brakes
Joined: Oct 2014
Posts: 802
Likes: 122
From: Goodyear Arizona
Different topic. You live close to the Tonawanda Corvette engine assembly plant. Two weeks ago four friends and I took the tour. Outstanding experience.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
Please post year and build dates, if known. My 2015 with a 12/18/14 build date has been trouble-free so far with no HVAC software updates yet. The PIT5383A update may fix those affected.
Last edited by iclick; Sep 1, 2015 at 10:17 PM.
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Thread Starter
Intermediate
Joined: Apr 2015
Posts: 33
Likes: 1
From: North Tonawanda NY
Please post year and build dates, if known. My 2015 with a 12/18/14 build date has been trouble-free so far with no HVAC software updates yet. The PIT5383A update may fix those affected.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
All this is confusing. The PIT5383A was supposed to be for Corvettes built before 03/19/15, which would include mine. You had some of the DTCs on the list but I have not...yet. Out of curiosity I'd like to know why.
Last edited by iclick; Sep 5, 2015 at 03:38 PM.
Safety Car
Joined: Jan 2015
Posts: 3,941
Likes: 499
From: Northern Virginia
I have no inside knowledge, but as someone who wrote software for 20-plus year my guess would be a bug that occurs only when a particular group of settings is made. For example, outside temp is above 85, inside temp set below 65, fan set to high, etc. Unless you hit that specific set of conditions, the fault will never happen.
Melting Slicks
Joined: Mar 2013
Posts: 3,104
Likes: 626
From: Baton Rouge LA
I have no inside knowledge, but as someone who wrote software for 20-plus year my guess would be a bug that occurs only when a particular group of settings is made. For example, outside temp is above 85, inside temp set below 65, fan set to high, etc. Unless you hit that specific set of conditions, the fault will never happen.