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No hot air front and back

24K views 1 reply 2 participants last post by  RangerSVT 
#1 ·
i have expedition xlt 98 I change heater core thermostat and still not hot air any idea what can be?

 
#2 ·
There is a diverter valve near the heater core in the engine bay. Check the vacuum line going to it and make sure it has good vacuum, and that the valve is working...

SVT
 
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