If tapping the switch makes the compressor works, the problem should more likely be at the switch and not at coils etc.
The knocking A/C coil, actually it is not the coil that is knocking. The pulley bearing is bad allowing the pulley to knock against the magnetic coil when in operations. This could be intermittent if the bearing is just beginning to fail.
Tuesday, May 3rd, 2011 AT 12:04 PM