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My 97 F-350 A/C compressor cycles on and off. If I put a jumper wire on the condenser the compressor stays on and seems to cool well. Can I just change the switch on the condenser do I have to change the condenser?
There is no switch on the A/C condenser. It sounds like you are referring to the low pressure/clutch cycling switch on the side of the accumulator.
Reference this:
The switch I am referring to is the one on the upper left.
To answer your question, no you cannot leave the switch jumpered. Your symptoms are most likely caused by a low charge in the A/C system or the switch itself may be bad. Typically when the switch fails the clutch never engages (open circuit).