Mine has always worked fine, as a matter of fact the kids always complain that it is too cold and the want the Manual control turned on so they can turn it off!! You can check to see if the A/C has set any codes, here is the procedure.
1. Turn the ignition switch ON (II).
2. Press the AUTO Button and then the OFF button. Continue to hold both buttons down for 1 minute.
If there is any abnormality in the system, the tempature indicator will light up the segment (A through N) corresponding to the error. The Tempature indicator will then alternate every second between the errror code and "88" (all segments lit) and the error code segment (A through N).
Note: The system will only display the error code when the AUTO and OFF buttons are pressed. If you release the buttons, the display will go blank. To return to the display, simply press the AUTO then the OFF buttons again. If there is no abnormality the segments will not light up.
The segments they are talking about are the 7 segment LCD's used to display the Tempature. There are 14 segments and they are arrange from A to N. A is the top left vertical segment of the left number, B is the top left vertical segment of the right number. C is the Top Horizontal segment of the left number and D is the Top Horizontal segment of the right number. E is the top right Vertical Segment of the left number and F is the top right Vertical Segment of the left number. I could go on but you get the idea. If you get a code I can look it up in the Service Manual or you can buy a service manual at
www.helminc.com for $67 and shipping.
If just the rear blower is not working it is probably a blown fuse, bad ground, bad rear power transistor, Rear blower, or rear blower relay. The 2 fuses to check are No. 52 (30a) in the under-hood fuse/relay box, and the No. 3 (7.5a) fuse in the driver's under-dash fuse/relay box. Good luck.
Greg