My idle does not drop below 2000 rpm while the AC is on. If I reach up and
shut off the AC  the idle goes back down to about 900 or so. This happens
when the engine is warm, at first it was intermittant but now it happens
all the time.

What's the likely cause of this? What's the connection between the AC and
the idle curcuitry?

Any ideas appreciated...

Aloha,

Gordon Smith
Honolulu

(... yes it's warm enough to use the AC here...)