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I have a Ford E300 in a 1982 RV. The heater is stuck ...

Sent to Ford Experts October 9 2007 at 2:05 PM
   

I have a Ford E300 in a 1982 RV. The heater is stuck on defrost and will not switch to vent or floor or mix. Any direction would be greatly appreciated. thanks. Roger

Customer (name blocked for privacy)
Answer
October 9 2007 at 3:30 PM (1 hour and 24 minutes and 43 seconds later)
         
ACCEPTEDCheck Mark

I'm not sure becuase of the RV setup, but the problem is a check valve for the vacuum controls. Usually under the hood on the passenger side, this valve allows the system to hold vacuum, when there are conditions where the engine is not producing vacuum the check valve keeps the vacuum resevoir from loosing it's accumilated vacuum. The valve may also be under the dash on the passenger side. If the valve is not the concern, than the airflow door inside the heater box will most likely be stuck...

~Rip




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