Electrical Questions? Ask an Electrician Online.
Welcome. My name is XXXXX XXXXX would be glad to assist.
You have a double pole 15 or 20 amp breaker connected?
ok, and it is a double pole, correct?
ok, can you turn off power, then look on the compressor. You will find a pressure switch that the power cord is connected to. Remove the cover and look at the connections.
The pressureswitch automatically starts the motorwhen the air tank pressure dropsbelow the factory set "cut-in"pressure. It stops the motor when theair tank pressure reaches the factoryset "cut-out" pressure.
It could be the switch is stuck open
The manual also shows an on off switch on that unit
actually says On-Off-Auto in the manual I have
the unitt is urned off
Do you have a voltage tester?
how many terminals in the pressure switch? 2 or 4?
4 2 black and 2 white
ok, use the tester and turn on power. Measure the white and black on the cord at the 2 terminals and read the voltage, then read the other 2 outgoing wires on their terminals, see if the voltage is 240 volts on both sets
my voltage meter is not working
Does yours have the ON OFF AUTO switch on the compressor?
Ok, and you tried ON and Auto and neither works?
Ok, put it in Auto mode and tap on the pressure switch. Not real hard, but hit it with a screwdriver to see if it latches in
The are spring loaded and it may be stuck
ok hit it nothing
Ok, turn off power and see if you can remove the cover on the On Off Auto switch, look for a loose wire. If nothing is loose, need a tester to troubleshoot
k all wires are tight
Ok, need a tester to go any further.
k thank you
Have to test the wiring, from the breaker to the switch, from the switch to the pressure switch and from the pressure switch to the motor
Somewhere it appears one of them is bad and not making contact or possibly wire loos in motor connections
see if you can open the cover where the motor is wired , should be a cover ob=ver the wiring compartment
ok thank you for the help
ok, get the tester and come back and let me know, we can work from there
ok thank you
you are welcome