So recently I have been having an issue where my heater or AC won’t turn on. All the buttons work, but nothing blows from the vents. It’s weird because sometimes it works fine and it turns on. Why would it sometimes work and sometimes not? Is it just the blower motor? Relay? Something else?
there is a motor, and there is a circuit board. probably one or the other. it is under the cabin filter. you can find threads here, or possibly @NutzAboutBolts youtube videos.
Maybe I'm stating the obvious, but your symptoms perfectly fit the unit being in AUTO mode and the ambient cabin temperature near the the set temperature ("nothing blows") and then "works fine and turns on" when the ambient cabin temperature is different than the set temperature. That would explain why "it sometimes work and sometimes not."
That turned out to be the problem. I bought a new motor and it was super easy to install. No more lackluster blow strength or intermittent power. Thank you!!!
