96 LT 4 x 4 292K miles. All I find are old threads about this so here's a new one. I got my AC fixed after 13 years of none. 1 day after, I have cold water pouring out of the heater core box. I pulled it and the heater core is hot all the time. I replaced the heater valve and the controlling solenoid valve. No change. I replaced the HVAC control panel not too long ago with a used part. Can someone tell me what the default setting is for the heater valve? I assume that when the AC is running, the heater core should not be hot. Is this true or is it always hot but not in the airflow. I've been thinking that the hot core and the cold air are mixing and condensing into rain. It's like turning on a cold water hose as soon as the AC is turned on. Now, my recirc actuator is disconnected at the moment as it clicks constantly when it reaches the end of it's travel. I have the valve in recirc position. I also now have no defrost heat. I can get plenty of cold defrost air. Of course right now the cover is off the heater core so it's hanging unboxed. Maybe that's the reason for that? Anyway I also have never had decent airflow to the left side of the dash. I have cleaned out leaves and such from in front of the evap core but not much change,. First up, I need to know what controls the heater valve and how it is supposed to work. My weird defrost airflow, I understand may be of my own making with the box removed. The other 2 door actuators move and appear to be working. I can't fix it until I know how it's supposed to work of course. Mind you somewhere on the property I have the factory service manuals but I'm old and lazy and if I can get someone to tell me what I need to know it will save me a lot of time, effort, and beer. Thanks.