Climate Control Mixer

2000 Cherokee. As many of you probably know, I recently swapped out the heater core and evaporator.

New issue, the climate control is stuck on heat. The electronic mixer had evidence of coolant in and on it. I’m wondering if it’s fried. I’m hoping I can replace it without removing the dash. It initially moved from cool to heat but is now stuck on heat. I tested it when I put it in and it moved freely. Everything else seems to be working fine.