Just got the AC fixed. Or not. Worked. Stopped working. And it's working again.

[bullas1022]

Mine did the same thing it was the cycle switch on the drier

 

[my name is alex]

Mine did the same thing it was the cycle switch on the drier

Yep, it looks like it's the cycle switch on my truck as well. We finally got the ac to act up as I was at the shop today to pick up my truck.

 

[Ruger_556]

Sounds like you got it fixed

I don't know if a '99 has the high pressure switch in the back of the compressor like the old trucks but the connector can break and cause cycling issues also. They're real easy to check, with the A/C switched on see if the clutch cycles when you move the connector.

 

[bullas1022]

The connector on the harness for the cycle switch commonly goes bad on the older trucks but the newer trucks have a different design on them if I remember corectly

 

[my name is alex]

Just to give this thread some closure - my ac has been running fine since the mechanic replaced the cycling switch.

 

[inscarguy]

mine did the same thing a few years ago. I checked everything all was ok. I tried jumping the low pressure switch and the compressor kicked on. changed the switch and all is well.