AC is F-ing up. Help Please

[robthebuilder]

99 F250 Super Duty 7.3

Recently charged my AC and it works fine UNTIL- I get going down the highway (60 mph) then it starts blowing warm air. When I turned off the highway the compressor kicked on again and worked for a little bit, then quit again. When I parked it here at home I opened the hood to see the compressor was not working at all. Later, I went out to see if would work. Turned on the AC, and it took a few seconds for the compressor to kick on, then it stayed on like it should, then after it had been running for a while it kicked off for a few seconds every so often, which I think is normal, right? So what can it be? Relay? Compressor? Clutch? Help please!

[Jarrod B]

i need to know also cause i dont get ac as well for almost the same reasons

[RadarRider]

Sounds like either a bad clutch or switch. Anyway, here's a

could also be the switch, had mine go bad and it would work intermittently

[Jarrod B]

wheres the switch?

[RadarRider]

Originally Posted by bockhold

wheres the switch?

It's on the compressor.

Originally Posted by RadarRider

It's on the compressor.

[Jarrod B]

is that the 2 wire plug?

[jbeasts10]

You didnt over-charge it did ya?They dont like it when there over about 46 on the low side,,with the rpms up around 1700.

[robthebuilder]

is the compressor supposed to kick off occasionally? As to keep the evaporator core from freezing up completely?