I've read all the posts I can find about fixing cooling system problems, and I've replaced everything of any significance in the cooling system in the last 6 months: About 4 months ago, DMC Houston diagnosed and repaired a problem with the wires running to the cooling fans. That was the beginning of my cooling system problems. About 2 months ago, the water pump started making a lot of noise. I also had that replaced. About two weeks ago I noticed that when I sat idled for a long time, the temperature got dangerously high, and the cooling fans would not come on. Thinking I had the infamous air bubbles in the water pump, I bled the air from the water pump and promptly installed the self- bleeder overheat protector kit. This didn't solve the problem. I know coolant is circulating through the system, because if I take a 2 hour drive on the interstate, the engine stays cool. However, if I sit in stopped traffic for 5 minutes (poorly designed traffic systems make Urbana-Champaign a perpetual traffic jam), the temperature quickly rises above the 220 mark. The cooling fans come on when the A/C compressor is on, and when I short the fan switch wires together, the fans are on constantly. Thinking the fan switch would be the only thing left to replace, I installed a new one. This, also, did not solve the problem. I have now hit a brick wall. I figured I could bleed the entire system, but I'm not convinced that will do anything. I know coolant is circulating past the fan switch. The fan switch is on the *bottom* of the radiator pipe, and the pipe gets extremely hot when the engine is running. The pipe and adjacent hose, like in most D's, I assume, are inclined slightly so any air bubbles in that pipe would propagate up to the water pump. Or I could order *another* cooling fan switch... If anyone has a clue what I could try next, please let me know. Aaron #1506