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Message: [QUOTE="Tiha, post: 1563841, member: 33189"] So hard to troubleshoot over the internet. But it sounds like under charged. I would say over charged is possible but I don't think there is a high pressure cut out on these trucks. Going down the road there is plenty of air going across the condenser, that is not your problem. It would be really nice to see the pressures, but you can try this. With the truck sitting still, rev the engine to 2000 rpms and hold it. Watch the ac compressor. If it starts and stops, the system is most likely under charged. Because, when you rev the engine, everything works better. the compressor pumps and sucks harder. I would imagine it is pulling hard enough to trip the low pressure cutout. AC systems should be charged with engine at 1100-1500 rpms. Most shops just charge it by weight to what the sticker says. With all the parts they replaced, the factory weights are going to be way off. [/QUOTE]

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