Why does only one side of my heater work in my car?

This situation can be caused by a bad blend door (also called air mix) actuator, a broken or binding blend/air mix door, broken linkage to the blend/air mix door, or a faulty HVAC control head or wiring harness.

How does the a / C work on the passenger side?

You have two air mix control dampers; one for the driver’s side and one for the passenger side that are independently controlled and operated by electric servo motors. It sounds like your a/c is operating fine since you get cold air on the passenger side.

Why is my driver side airconditioner not working?

There is only one a/c and only one temperature of air comming from the a/c coils. What could be happening, and I think this would be rather rare, is that the “doors” in the system that direct air flow are not operating properly on the driver side. ie. they are in the fresh are or ambient air mode.

Why is there no hot air on the driver side?

My golf mk7 gt 2013, has developed a fault with the heating. no hot air is being produced on all driver side vents ? passenger is ok. after watching some vids i thought it would be one on the thermistors in the vents, however these are not fitted to my golf. Common problem for that flap motor to go tits-up.

Is the driver side air conditioner the same as the passenger side?

Yes, there is a separate set of coils for the back, but these make no difference on the temperature on the drivers side vs the passenger side. Checked heater valve cable on the engine and the drivers air mix motor. ok. Used HDS and checked for Body/AC DTC’s.

You have two air mix control dampers; one for the driver’s side and one for the passenger side that are independently controlled and operated by electric servo motors. It sounds like your a/c is operating fine since you get cold air on the passenger side.

Is there cold air coming out of the passenger side?

WOW! part numbers 80321-shj-a02 and 80341-shj-a01. The “low freon” speculation…needs to be investigated. I suspect the cold air coming out of the passenger side is plenty cold, which would not be possible with a freon leak. Before bringing it into the shop, check out the driver’s side air mix motor.

Can a AC fail on the driver side?

Yes the AC always start to fail on the driver side first, I have the same problem for five times already. My AC has also been blowing warm on the driver side. It took a really hot day here in the Northeast to really expose the problem. I was having the problem a couple months ago but it wasn’t hot enough outside for me to really notice.

Why do you get cold air on the driver side?

The evaporator core is on the passenger side of the vehicle on most makes, so that is why you get cold air on the passenger side. By the time the cold air makes it to the driver’s side, it has picked up a lot of heat, and you feel the difference. I wanted to thank you guys for posting this info.