Posted by Fritz Campbell on July 29, 2012 at 10:28:52 from (98.21.77.50):
I have a C/H tank on wheels air compressor. Model #957607 20 gal cast iron series. I bought this compressor new back in "92 and it has been a good one. I forgot and left it plugged in last night and this morning I found that it must have come and ended up tripping the breaker to the outlet I usually plug it into. The outlet that I usually use isn"t just for the compressor and also serves some lights in our mudroom - I have had times that it has tripped the breaker when it comes on and we have lights on in the mudroom. I typically never leave it plugged in over night or when I"m not using it.
Anyway - this morning the breaker is tripped. I reset the breaker the compressor motor hummed - but never started - and then tripped the breaker again. I plugged it in to another outlet (different circuit) and the motor hummed, never started and then tripped that circuit breaker. I removed the belt guard and can spin the Emerson electric motor by hand easily. I used the safety valve to let 1/2 the air out of the tank, gently tapped around the motor and pressure switch assembly with the same results. The red thermal overload button did not pop on the electric motor and I did not smell anything burnt on the motor.
Could I have a bad pressure switch on this? The p/n CW208102AV for the pressure switch has been superceeded to CW301300AJ and looks like the entire assembly with pressure switch and regulator for around $80 or so. The compressor is enough for what I need in the garage and is certainly worth putting some money into.
What should I be checking for before I start throwing parts at it? Much obliged.
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