Quote:
Originally Posted by Jeremy5848
With the CCU set to maximum cooling, check the voltage at the monovalve. It should be close to 12 volts, which closes the valve so no hot coolant gets into the heater core. If voltage is present but you still get hot air, then the monovalve solenoid is hung up or the rubber diaphragm is torn.
If you don't have 12 volts across the monovalve then something is wrong with the CCU or one of its sensors.
Jeremy
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OK, pulled the monovalve plug and checked the voltage. With the control on high heat, I got 3 or less, and it varied, after turning the control to max a/c, the voltage went to consistent over 12....
Looks like the monovalve is going to be opened up.
THX !!