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Is anyone else having constant issues with the rear evaporator? This is the 3rd time I’ve had to have it replaced and since the vehicle is just out of warranty the dealership wants bend over and pay for it. I found a tech bulletin that basically provides no corrective action other than replacing the evaporator and then wait for it to fail again.
#16-NA-046: A/C Inoperative, Blows Warm or Poor Performance Due to Low Refrigerant Charge, Freon Leak – (Feb 17, 2016)
Subject: A/C Inoperative, Blows Warm or Poor Performance Due to Low Refrigerant Charge, Freon LeakAttention: This Bulletin also applies to any of the models that may be Export vehicles.
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This Bulletin replaces PIT5335A. Please discard PIT5335A.
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Brand: Model: Model Year: Breakpoint: Engine:
Transmission:from to from to
Buick
Enclave
2013 2016 Vehicles Built Prior to October 6, 2015 All All
Chevrolet
Traverse
2013 2016
GMC
Acadia
2013 2016Condition Some customers may comment that the A/C is blowing warm, is exhibiting poor performance or of a general lack of air conditioning, or low charge.
Cause The cause of this condition may be that, during operation, the auxiliary evaporator blower motor may emit brush dust that contains some copper particles. These particles could lead to accelerated corrosion to the auxiliary evaporator and a small refrigerant leak.
Additional Options Equipped with Auxiliary Air Conditioning (RPO CJ2)
Correction
After performing normal SI diagnostics, if the source of the leak is not found, check for a leak at the auxiliary evaporator core face. Remove the auxiliary blower control module and insert the GE 50078 Electronic Leak Detector to test for a leak, as well as employing the use of a black light.
If a leak is found, continue to the Service Procedure below to replace the evaporator, blower/fan assembly and thoroughly clean the interior of the evaporator case.Service Procedure
1. Remove the auxiliary a/c evaporator (1). Refer to Auxiliary Air Conditioning Evaporator Replacement in SI.
2. Remove the auxiliary blower motor assembly (1). Refer to AuxiliaryBlower Motor Replacement in SI.
3. With the evaporator case disassembled, use compressed air to blow any copper dust from the inside of the case.4. Use GM glass cleaner, P/N 19287404 (in Canada, 88865156), and a cloth to wipe down the linear power module and the inside surfaces, (1) and (2), of the case.
5. Install the new auxiliary a/c evaporator. Refer to Auxiliary Air Conditioning Evaporator Replacement in SI.
6. Install the new auxiliary blower motor assembly. Refer to AuxiliaryBlower Motor Replacement in SI. -
I purchased a 2014 Acadia Nov 2018. rear evaporator and motor were both replaced summer 2016, less than 2 years owned with low miles under warranty. Just past the two year mark of a/c replaced parts we again have the same air conditioning failure problem.
GM will not participate in second repair with less than a year out of warranty nor acknowledge the part materials fail creating the leaks. Even with the notice you posted. This is a part which should get in the 75k miles plus range before A/C repair. I also spent a lot on my Montana A/C just beyond the 3-year warranty.
The GM dealer knew what the issue was with the A/C the first time I went in for repair—faulty part. The replacement is also faulty.
I need to buy from a company more concerned with their materials testing and responsibility for the failures. The Acadia is too expensive to expect me to install a new evaporator and motor every two years. My call into GM customer service only resulted in more days with a hot car.
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