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
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2 answers 2 comments
ANSWER by , 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 , January 24, 2013
ck heater control valve or vac to it,1st ck coolant level
COMMENT by , 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 , January 24, 2013
wow sorry didn't know the had them in that was ahead of there time in