Need help if anyone has had this problem. Turned on the heat in my 13 JK last night and nothing but cool air. Checked the thermostat good, lines under the hood to heater core hot, line under dash inside hot. Been getting flashing liguts on control know periodically. Anyone else run into this?
Been known problems with sludge from the coolant plugging the heater cores in some JKs. I had sludge in my reservoir and had to have my heater core, radiator replaced. They tore out the entire dash.
This is a known issue. The light flashing in the A/C heater control module indicates an electrical malfunction.
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