I don't have much experience with repairing air conditioning but here's the story:

Today I noticed the lack of cold air from the vents when the AC was "on". Plenty of airflow, just no cooling.

Auxiliary fans are not coming on nor is the compressor engaging.

Found the info on obtaining the Actual Values and came up with reasonable numbers (range from 95-111 degrees F)for all the temperature sensors. The refrigerant pressure reads "08" which seems legitimate with no compressor operation.

Codes pulled are:
B1419 Electromagnetic clutch
B1226 In-car temperature sensor
B1234 Sun sensor

Here's the wierd thing. The compressor clutch is producing a burned smell with the climate control set to OFF. You can hear it and see it barely making its way around in rotation about an 1/8th of an inch at a time per revolution. It sounds like a dragging brake disk. I can also move the clutch by hand quite easily.

I just replaced the coolant, fan clutch, aux fan belt, and main belt and the car was operating fine until this afternoon.

Oh yeah, if anyone can tell me where the fuse is for the clutch, I'd really like to know about it. I've been through all three fuse boxes and can only find one labled Blower Motor AC.

Ideas? Thanks in advance!

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2005 Pathfinder LE
2001 E55
1998 M3
1982 320i