99 JXI Convertible Heater Not Working
#1
02-09-2016, 06:36 PM
99 JXI Convertible Heater Not Working
The heater on my 99 JXI will turn on hot but after a few seconds will turn cold. I can turn it off and turn it back on and will do the same thing. Replaced the thermostat and coolant and still nothing. Any ideas?
#2
02-10-2016, 11:17 AM
Check the operation of the blend door. It's a flapper inside the heater plenum that controls temperature by adjusting the mix of hot and cold air coming in.
#3
02-10-2016, 04:17 PM
sounds like a heat core clogged up. Warm engine up feel both the hoses going into the fire wall they need to feel hot where you can not touch them.
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