Need to replace pressure switch?

by Robert Blair
(akron ohio)

I have model 40400 with a leaking valve inside the switch.


Two outlet on the bottom of the switch with a pull/push, on/off switch

I need to replace the switch, I can not seem to be able to find a way to remove the bad switch. Does the top come off of the switch some how?

Comments for Need to replace pressure switch?

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Apr 05, 2016
Hung up on it not being a pressure switch problem?
by: Anonymous

You sure are hung up on it not being a pressure switch problem.

I'm not going to waste my time other than to say it probably is the pressure switch. The diaphragm in the pressure switch failing is actually quite common (China).

Aug 13, 2015

by: Bill

Hi Robert... when you say "the gasket inside the cutoff valve has likely has gone bad", are you referring to what is typically a diaphragm inside the pressure switch?

When is the leak occurring?

If air is leaking out of the pressure switch when the compressor is off, the only place it can be coming from is the tank, and that points to the tank check valve.

If air is leaking from the pressure switch while the compressor is pumping, that might be the unloader valve leaking.

I'm not quite sure where your compressor leak is happening, however.

Bill

Aug 13, 2015
Replaced Check Valve
by: Robert

Bill,
I have seen the page, I also have replaced the check valve, I researched the sight and learned that the gasket inside the cutoff valve has likely has gone bad. Does this makes sense?

Robert

Aug 12, 2015
Leaking pressure switch
by: Bill

Robert, see the page on this site about troubleshooting a leaking pressure switch.

You will find, I think, that there is nothing wrong with the switch.

The issue is likely a leaking tank check valve.

Bill

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