Pressure Switch.
Replace the pressure switch.
Caution: If the system is operated for a long time with power off of the pressure switch, the pipe
and parts of the system may be critically damaged.
Does the compressor
suddenly stop at pressure when the
pressure switch does
not operate?
Start of check
Turn power off of the pressure
switch and restart
No failure of pressure switch.
Yes
No
No
Yes
Yes
Is the operation normal?
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