Heater valve not working. Source of vacuum? | Ford Explorer Forums - Serious Explorations

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Heater valve not working. Source of vacuum?

Jordan4461

Member
Joined
June 29, 2018
Messages
34
Reaction score
5
Location
ZOO Parkway
City, State
Asheboro, NC
Year, Model & Trim Level
2008 Explorer Eddie Bauer
Hi folks,
My 2008 Exploder has a new heater valve, installed when I changed the water pump and all hoses. I tested it with a vac pump and it works fine, but does not get any vacuum when I choose heat and run the temperature knob into the hot zone. Anyone know the actual location of the source for the vacuum supply? Does the selector switch provide the vacuum, or the temperature knob?
Thanks for all help. I need to fix this before winter gets here.
Jordan
 






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