The A/c on my 00 TL went out while my son was driving After some research, I replaced the blown 40amp fuse in the engine bay, the blower, the resistor, the blower wire harness and the climate control with a used compatible unit. Still no A/C. The weird thing is the blower now works but stays on when the car is running, even when it's turned off at the climate control. Also the condenser fans and compressor clutch are not running when A/C is turned on. I ordered a blower motor relay and will try that next. Scratching my head now. Any help is appreciated.

 

Sounds like relay to me too

 

When I pull out the current relay the blower stops working. Crossing my fingers a new relay will do the job.

 

Just replaced the blower motor relay today and system is still not working properly.

 

The HVAC has a built in self diagnosis feature. I would start there.

Search AZ for instructions.

 

Figured it out! The resistor I bought through eBay was bad. Bought a replacement resistor from AutoZone today, plugged it in and the A/C fired right up. Thx for the hep