I have been having issues with the HVAC for about 3 years now. Replaced blower motor and resister 3 times since then. Finally raised hell with the dealership to get them to look further back than those items - spoke with the shop forman and he agreed to look at it with his tech. Turns out, there was a leak from the sunroof in 2019 that caused the ground wire for these components to rust and fail, thus causing the HVAC system to no longer work. He made mention that other ground studs were "questionable" but of course didn't tell me which ones. Does anyone know what other grounds exist under the driver-side seat that he could be referring to? Asking because I have a few other intermittent codes that I'd like to see if they are related (one of which was the heating in the seats).

 

Thanks for your response. I saw an intermittent code on the seat heater, so I’m betting that’s the cause. Is there a ground under either seat for the air bags or any other electronics? The light for that comes on occasionally as well. It’s been looked at by the dealer several times - stays off for a while then comes right back on. I’m trying to determine how many new bolts I need to pick up before I start breaking things down so that I can do it once and be done.