1993 W124 E280 - Aircon - Faulty Duo Valve

Here's a possible cause for a common problem - the aircon blows cold on one side, but not the other.

In my case, the passenger side was cold, and driver side was hot.

Electrics work fine, and I had the R134a topped up. It was at 30% volume.

Wiring was corroded on one side, and there was a split in the rubber seal.

[kowal]

Hi. I have different problem on my w124, no AC. It only blows hot air. There is aprox 14v on pins when set temp to minimum, valves are clicking. When to max they are not clicking and no voltage. So electrically is fine. Plungers are not broken, only a bit rounded on the "heads". everything cleaned. Where is the problem?