No heat on Drivers Side - Hot on the passengers Side

[Guardsman]

Recently my dash heater stopped heating the driver's side of the coach. It would blow only cold air while the passenger side worked as it should blowing hot air.
I suspect that a mixer valve has failed or stuck has anyone experienced this particular problem? If so how difficult is the fix?

[BrianGlenn]

Evans Tempcon otr HVAC unit is up inside inspection hole above passenger side when gen set extended. Has separate blend doors for passenger and driver. Check to make sure vacuum line has not fallen off drivers side.

Second there are two electric water valves up there as well - again one for passenger and one for driver. Check wire connections and valve operation. Drivers one may have failed.

Hope this helps.

Brian

[Guardsman]

Thanks Brian I was afraid i was going to have to hire a very small person to get under the dash to access the system;