how do i get heater to work on 1997 Dodge Ram 1500

im having trouble getting hot air coming out when switch is on heat,both hoses are hot i already blew through the heater core with 90 psi air and thats clear hmm what next

by in Newark, CA on January 24, 2013
2 answers 2 comments
ANSWER by on January 24, 2013
You may have a "Blend" door issue. Check the vacuum hose that goes into the firewall. Check blendor actuator for blown diaphram. Vacuum source comes from somewhere on the intake manifold.
ANSWER by on January 24, 2013
ck heater control valve or vac to it,1st ck coolant level
COMMENT by on January 24, 2013
Hey Greg...I looked in Alldata for a heater valve..Does not list one. I think it uses doors ot flaps, the schematic shows vacuum motors/actuators
COMMENT by on January 24, 2013
wow sorry didn't know the had them in that was ahead of there time in
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