AC issues
08-31-2015, 05:50 PM
#1
Intermediate
Thread Starter
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
09-01-2015, 01:58 AM
#2
Burning Brakes
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...
09-01-2015, 09:17 AM
#3
Burning Brakes
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.
09-01-2015, 09:19 AM
#4
Racer
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
09-01-2015, 10:29 AM
#6
Intermediate
Thread Starter
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!
09-01-2015, 10:15 PM
#8
Melting Slicks
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; 09-01-2015 at 10:17 PM.
09-03-2015, 10:07 PM
#9
Intermediate
Thread Starter
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.
09-05-2015, 03:33 PM
#10
Melting Slicks
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; 09-05-2015 at 03:38 PM.
09-05-2015, 04:59 PM
#11
Safety Car
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.
09-06-2015, 04:10 PM
#12
Melting Slicks
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.