A/C SYSTEM BLOWS FUSES

1979 GMC Sierra

Tiny

Al Broome

December, 26, 2009 AT 5:27 PM

Air Conditioning problem
1979 GMC Sierra V8 Two Wheel Drive Automatic 120000 miles

1 year ago I replaced the A/C compressor, Receiver Drier and flushed the entire system (disassembled system including hoses. Converted system to R-134 and stayed cool all summer last year. This past summer had to reservice the system with 134 and discovered that the cycling switch was defective. I replaced the cycling switch with an after market switch (Auto Zone) marked for 134. After installing the 134 switch the system worked for approx. 5 minutes and blew the system fuse. I have replaced several fuses and they continue to blow. Should I have replaced the switch with an R-12 switch? The system worked fine for more than a year with the original R-12 switch installed. Is the R-134 switch set at a different pressure than the R-12 switch?

FOUND 7639 RELATED QUESTIONS

A/c 02 L 300

41 ANSWERS
2 IMAGES

Ac Will Not Turn On!!!

36 ANSWERS
3 IMAGES

0 Answers

Please login or register to post a reply.

Cabin Air Filter Replacement Honda Civic
Cabin Air Filter Replacement
Cabin Air Filter Replacement