Hello Scotty! Long time viewer here. The other day I was driving and I turned on the heat, Heat only came out on the driver side but not the passenger side! Checked it the next day and it was working okay again! I want to troubleshoot this and fix it myself, where should I start? Vehicle is a 2013 Cadillac ATS.

Thank you in advance, and keep up the great work!

Comments
No. 1-2
Serious_Shuck
Serious_Shuck

I was afraid you were going to say that. Thanks for the quick response.

ScottyKilmer
ScottyKilmer

Editor

ARGH, those stupid computer driven heat systems are computer run. You need a computer to do testing bidirectionally and see what works and what doesn't . On that, often bad actuators inside the dash do exactly that, and man, they cost a TON to replace.