Originally Posted by Stief Bijer
Thanks for your advice, but as I stated in my original post:
> the dealer is quite inconveniently far away
> I ALREADY replaced the filter inside the car behind the dashboard on the passenger side (what you apparently call the "cabin" filter)
So far: 60+ post views...but 0 ideas
Unfortunately for my mother, this problem must be too complex for the members on this forum to give any help. :-(
so let me get this straight :
1. your mother brings the car to the dealer and pays to have the a/c fixed.
2. the a/c in not working.
3. you don't want to bring the car back to the dealer to have them fix the a/c that they were already paid to fix. if the dealer is so far away, why did your mom go there in the first place?
4. your now asking us to diagnose your mom's a/c without seeing the car.
the dealer was the last person to touch the a/c system and if you want to pay someone else to diagnose and fix the a/c, it's your money.
see if compressor's clutch clicks on when the a/c is turned on. if the compressor's clutch doesn't engage :
1. it could be a loose or unconnected wire (at the compressor)
2. a loose wire or unplugged low pressure switch, or maybe the low pressure switch is bad. you can use a jumper wire on the low pressure switch connector which will trick the system into thinking the switch is fine. if you jump the connector and everything works fine, you have a bad low pressure switch.
check to make sure the belt has proper tension (with the engine off).
p.s. these are just a few suggestions.