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

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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
(2) Answers
(2) Comments
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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.
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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
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