I have a 99 Explorer Sport My A/C worked Last summer and this spring I just turned it on and noticed it just blows air. The compresor clutch is NOT cycling. I bought one those self charge kits, connected it to the low side it had 40-45psi, ok according to the guage. A/C cycling switch on the Accumulator/Drier? I noticed the commpresor clutch does not go on at all. I unpluged the connector on the A/C Cycling switch, jumped the connector and boom, the clutch on the compresor kicks in. Is it possible that the problem lies within the A/C cycling switch and or low refrigerent and NOT the A/C presure cut off switch on the Compressor itself? Are A/C cycling switches common to failure? The A/C Cycling switch contacts are supposed to open when pressure drops to 22-28 psi and close at 40-47 psi. Now given that on the gauge I had 40+ psi and the clutch only went on when Jumped, I suspect my cycling switch is stuck on open position and therefore not energizing the compresor clutch, Hmmm. Thoughts? The Cycling Switch runs $15-$25 should I just give it a whirl? It's not that expensive, I just did'nt want to start throwing parts in Thanks in advance to any responses.