A/c pressure switch maybe?
This is an a/c site you can post to try and get their help.
http://www.autoacforum.com/categories.cfm?catid=2
Also read this thread.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1188779&page=&view=&sb=5&o=&fpart=1&vc=1
Originally posted by projectSHO89:
If the compressor clutch is short-cycling the switch is fine. The refrigerant is just low. Whent he cycling switch fails, it usually causes a no-engagement condition.
With the system OFF, underhood temp at around 60-80F, you should show around 70 psi or so (static pressure). This pressure changes with the ambient, so it will be hight if the under-hood area is hot or lower if it's cold.
Steve
Last edited by Tony2005; 05/26/06 12:19 AM.