AC Problem Help Needed (1 Viewer)

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The only way to properly diagnose A/C problem is to put a set of gauges on the high and low pressure side. One cannot even tell if the system is low on freon with the R134 system - the sight glass bubble is not accurate for the R134.

If the reading pressure is correct on the high/low gauges and the compressor still cycles, try shorting or unplugging the high pressure switch to see if its malfuctioning.
 

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