Hey y'all, I have a 2012 Ford Fiesta with 130k on it and i had the AC compressor replaced at 127k. Now it is summer time, and only one side of my car has somewhat cold air. I do not have a dual ac system where one side can be hot while the other can be cold, it is all one system. I also sometimes hear a knock coming from under the dash on the passenger side is that the causing problem?
Well if the passenger side is cold in a driver side is warm that means you're low on refrigerant but if it's the other way around it would mean something's wrong with the blend door inside the dash and it isn't opening up to send cold air on the passenger side if that's the side that isn't cold
But what explains the knocking from under the dash on the passenger side?
Maybe you have a stuck flap that keeps trying to move.
How do you fix a stuck flap?
Take the dashboard apart and see what's wrong with it, replace any broken parts.
