I've been wondering if this has been the cause of my AC function being so erratic. The speed sensor has been moved several times to permit the changing of the accessory belts. Is there a standard distance this should be from the A/C pulley? How much does it affect operation?

As far as i know it is a small coil which induces a voltage like a generator when the splines on the compressor pass it

 

its possiable that it isnt close enough and not creating enough voltage

its also possiable that a wire is broken in the sensor or wiring harness and only making intemittent contact

 

Hope this helps

 

 

Gannon

Is there an optimal distance? In any case, I'll try to move it a bit closer and see if the AC will kick in again.

The one on mt RX has a hole in the bracket and a bump on the mount surface so that it can only fit in a fixed location. I've had it off a few times with no issues, I could measure the space (when I get home) if it would help.

 

Gary

I have removed/replaced these sensors many times on several Subarus and have never had an issue caused by improper air gap. I believe that they were engineered so that exact placement is not critical.