Hey Everyone!

A while back I wrote that I had heat coming out of all my vents at all times. Turns out I had a stuck monovalve! Here's how I tested it;

1. Got a volt meter, and tested input voltage going to valve.
The voltage test 12 volts completely cold, and alternated between 6 and 12 until completely open where it registered about .6.


2. Created a jumper that went directly from the battery to the valve. With 12 true volts, it was still open.

Replaced the valve and all was good. I just replaced it today, so I will follow up in a few days with a status!

Thanks for all the help!
Mike

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Help me fix my mercedes!
Thanks!
Mike