takaiguchi

There are random times when there is a buzzing type sound coming from behind my radio head unit. If I change the circulation location like from face to feet, it'll stop, but may start again if I hit auto. It doesn't change with the fan speed and shuts off when I turn the heat/ac system off.

Ideas?

hypervish

If the noise comes when changing modes then it's the air mode servo. If it comes when changing the temperature, then it's the air mix servo.
Do a search, and you'll find out how to go about fixing it.

takaiguchi

Thanks! Found a lot of good info. Gonna wait for it to warm up before tackling that one.

RandomTech

Before you put motors in it, check to make sure something hasn't fallen into the fan. Pull the cabin air filter and stick your hand in the blower. Leaves in there make a buzzing sound.

takaiguchi

Good to know. Thanks!