Thread: 1991, 190E, 2.3 Hot air from the side vents
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Old 07-29-2002, 08:10 PM
joe p joe p is offline
it leaks, its german
  
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
Is the heater control valve closing? Pinch off the heater hose the the valve and see if you get cold air from the sides. If so, check for either a vacum leak or a busted diaphram in the valve itself.

The valve is under the cowl cover on the r/h side, sometimes the vacum hose is routed under the battery tray and will be damaged by battery acid.


Joe
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