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Power Washing, Roof Cleaning -> National Softwash Alliance -> In the Shop -> Pressure Switches
Post Info TOPIC: Pressure Switches
Jeff Thompson


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Pressure Switches
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When a pump stops working, is there an easy way to tell whether it's the relay or the pressure switch without swamping everything out? I'm sure it can be tested with a volt meter, but honestly I've made it through life so far without ever having to use one, so I'm not sure what points to test and understand what the volt meter is telling me.

I've got had two pumps down. Replaced the relays on each, one works, one doesn't so it's got to be the pressure switch on the one that isn't working I guess. The pump itself gave no indication it was about to puke.

This may be the dumb question of the day, but someones got to ask it.



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Jeff Thompson

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Art O


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Hook the black and red wires that go to the back of the pump to a battery. If the motor turns its the switch. You can take the switch apart and look inside and see if anything is going on. This is what I found inside a switch that went bad. Not sure what caused it and Delavan isn't answering my email.

 

DSC00203.JPG



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Roof Cleaning Virginia


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Great suggestion Art.

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Jeff Thompson


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Thats simple enough. Thanks Art !

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Jeff Thompson

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Fred W


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You can test both with a jumper.....because they're both just a switch. Unplug the two wires at each switch then insert the jumper wire. If the pump runs you know which one it is.

Call if you need a better explanation. Don't feel like typing.

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Art O


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Good video from Paul at the Power Wash Store. This is the old style 5850.  You would just have to cut the wires and tie them together



-- Edited by Art O on Sunday 11th of October 2015 06:38:37 PM

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Maverick Contracting


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Art I wouldn't even cut the wires, just cut back the insulation and use a short piece of bypass wire to test then you would just need to coat the exposed wire with liquid electrical tape

 



-- Edited by Maverick Contracting on Sunday 11th of October 2015 09:42:21 PM

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