Climate Control System acting up.

Recently my Climate Control System on Gen 3 has been missbehaving. A few weeks ago, I could not for the life of me get cold air out of the AC, and then just as quickly as it stopped working, it started working again. Then yesterday, I started noticing coolant temps on the Scan Guage rising to 215 - 220 F, which seemed quite a bit higher thant the 195 limit I had set for operating with grill blocking, so I turned on the Heater and brought it down to 195, and when I got home, I checked and the coolant level seems OK, and it was under pressure.

Also, the heater has always taken forever to get warm, and this morning, I noticed that when I had it set for it was cycling between very hot and very cold air. I have an appointment to get this checked out next week, but would appreciate any words of wisdom because my car is out of warrantee.

Also, I have a Circulating Tank Heater plubed between the cooland drain on the back of the block and one of the hoses at the back of the cylindar head that circulates coolant down around the exhaust for perheating. The idea is in the winter time, you plug in the tank heater and convection heat causes the coolant to circulate thought the cooling system and preheat the whole block.

With all the computers and sensors, I an thinking this tank heater installation may be causing the odd Climate Control system behavior and perhaps overheating, so I cannot decide if I shoud disconnect the tank heater before I take it in to service or leave it and tell aske the service people to help me confirm if it is plumbed in at a sutiable location.

Since my tank heater is an extra coolant circuit I added myself, I think I might just clamp off the tank heater hose with a pair of vice grips or something to test if not having that extra circuit fixes the weirdnesses.

 

Yeah, and my Bumper Car conversion voided the warrantee also.