Quote:
Originally Posted by 71C10Guy
Does the ac system used in these trucks need to cycle on and off, to keep the right pressure, or are they always on when cooling, no cycling? I might just be really dumb....
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On a factory A/C system the compressor runs continuously, the POA (Pilot Operated Absolute)valve keeps the evaporator from freezing and building excessive pressure. Most after market systems use a binary switch to basically do the same thing by cycling the compressor off and on.
They make a POA upgrade that fits in the space allowed on a factory air system to convert to a binary switch to cycle your compressor.
If your POA is a Delco brand it is non rebuildable if it is Frigidaire brand it is rebuildable and can be converted to 134A specs.
That's all I know about that.