AC Warm until rasing RPM's

[Quicksilver]

I hear you. Just a thought though. If you spent 5K this might be a good time to take advantage
of that good relationship with that indy or SA at the dealership. See if they'll give you some
free diagnosis time. Wont hurt to try. I've had the people who work on mine drop a switch or
sensor or provide a quick service at no charge. (had to pay for the part)

[bcredliner]

Originally Posted by flybye

Does the fan come on as soon as the A/c button is pressed? I only hear the fan engage when the engine starts to get warm.
Thoughts?

Does your engine have only the electric fan?

[flybye]

Nope I have 2 fans

[bcredliner]

Originally Posted by flybye

Does the fan come on as soon as the A/c button is pressed? I only hear the fan engage when the engine starts to get warm.
Thoughts?

The auxiliary fan should come on when the A/C is turned on, when the engine overheats and for 5-10 seconds when you first start the engine.

[upallnight]

The auxiliary fan does not come on immediately when you turn on the AC. The pressure in the AC system along with the ambient temp and the temp in the condenser determine when the fan comes on.

[bcredliner]

Originally Posted by upallnight

The auxiliary fan does not come on immediately when you turn on the AC. The pressure in the AC system along with the ambient temp and the temp in the condenser determine when the fan comes on.

Oopsie, you are correct the aux fan does not immediately come on when the air is turned on. Per my handy dandy Bentley manual the aux electric fan is controlled by the ECM based on the following inputs to the ECM:

Radiator outlet temp.
Calculated catalytic converter temp.
Vehicle speed
Battery voltage
Calculated refrigerant temp.

When the vehicle is started the ECM activates the aux. fan briefly at 20% of max. speed for the purpose of diagnostic monitoring.