Flashing AC Backlight

Nitrousbird · December 20, 2022

Late build 2018 with 20k miles. The backlight on the AC button likes to flash. Will do it while driving, will do it while parked, will do it whether I push the button or not. Sometimes it will be solid, sometimes totally out, but mostly flashes on and off.

Besides replacing the who HVAC control panel, any reasonable fixes for this? Annoying. No other buttons have this problem.

JimCost2014 · December 20, 2022

If it is flashing 3 or 6 times, you have a problem somewhere. Could be a bad ground on the HVAC controls, ambient temp sensor is bad, low on coolant, problems with the HVAC system itself, ect...

Not sure if just a new control unit will fix this one.

Nitrousbird · December 21, 2022

22 hours ago, JimCost2014 said:

If it is flashing 3 or 6 times, you have a problem somewhere. Could be a bad ground on the HVAC controls, ambient temp sensor is bad, low on coolant, problems with the HVAC system itself, ect...

Not sure if just a new control unit will fix this one.

Totally random flashing. May stay out for several seconds, be solid for a while, flash in and out quickly or slowly. Nothing that one could indicate being some type of trouble code.