I see. Will the mono valve sill be wide open (supplying full heat to the cabin) if I unplug it? Also even with the PBU still plugged in I was still getting full heat in the cabin.


Since I had the PBU out I decided to open it up and found some discoloration (like white chalk) on the inside cover. This discoloration was above a part of the circuit-board that looked to be burnt. I will try to post some pictures of this.

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2005 Mini Cooper S 95,000 Miles
1993 Mercedes 300D 250,000 Miles
1986 VW Cabriolet
1985 VW Vanagon Weekender
1984 VW Vanagon Westfalia
1973 VW Squareback