Yet another air question

[tkswan]

2002 LS V8.

It's taking to long for the air to get hot. With both dual controls at 90 and the temp gage reading normal operating tempatures, the air is not as hot as it should be, it's more like lukewarm. If I stop the car for a few minutes (engine shutdown...like getting gas or something) then restart, the air gets hot like it should be. BUT! under both conditions when I am at curb idle (like a long red light) the air returns to cold. When I take off and the RPM's are up the are returns quickly to hot.

This started after a thermostat change. I have had the system professionally flushed and pressure bled twice now so I am failrly confident that there are no air bubbles in it. The thermostat seems to be working fine because its reaching its operating tempature in avreage time.

So what next? ...besides stay in warm environments.

[joegr]

The three main possibilities are:
1. There is air in the system because it wasn't bleed correctly. There is a very specific bleed procedure that must be followed pretty much to the letter to get all the air out. It's not a "pressure bleed."

2. There is/was gunk in the cooling system and it is clogging the DCCV, or the screen in the upper radiator hose where it branches off to the DCCV.

3. The aux pump isn't working.