Having problems with your 1999 Dodge Ram ?
I have a 1999 Dodge Ram pickup truck. The heater is not functioning properly. The heater core appears to be intact (no leaks) and is actually quite hot. Luke-warm air does blow from the floor and defroster vents. However, the center vents do not blow air at all, even when set (via the dash control unit) to exclusively blow from those vents. Any suggestions?
Heat/air blend door is most likely stuck and will need to be inspected from under the dash. it may also be in default mode because it has no vacuum supply to it. make sure you are getting vacuum from the motor into the cab to the heater control unit. that is only if it has vacuum and electric not all electric. that year is right around when they started to go from one to another. so check first.
Sounds like the door under the dash is not moving all the way into the heat position either from a vacuum leak or the control panel is bad
Repair Help & Product Troubleshooting for 1999 Dodge Ram
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