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Pressure Switch
The pressure switch in the photo controls the psi for my Marathon Aux Compressor. Recently, I’ve had to “jiggle” the two wires to get the pressure switch to work. I’ve had to sand down the two contacts over the last several months due to corrison/moisture or simply movement down the road.
My question, has anyone switched out an “unsealed” pressure switch (which I have) to a sealed pressure switch (photo below), which would prevent more corrision as opposed to the unsealed pressure switch?
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5 Replies
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Tim,
This may involve a few pipe fittings, but if you use what is called a “well control switch” you will have the same function as the fixed value pressure switch, but on in which you can adjust the compressor on and off pressures.
They are readily available at Lowe’s or HD. I keep my aux compressor set at a relatively low pressure because none of the accessory systems require much more than 40 or 50 PSI, so I am set at a cut out at 80PSI and cut in at 60 PSI. If I want to air up any tires I just use the bus engine to generate accessory pressure.
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Dialetic grease, Common at auto parts stores. Keeps corrision to a bay. I use on all connections I pull off or install. Works good on light bulbs in your exterior lights.
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Mine uses a well control like Jon suggested, but if I remember, your aux is either 12 or 24 volt. Just make sure whatever switch you use is will work with DC.
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All switches should work OK on DC. I’m surprised the aux compressor is a DC, but if it is the only thing needed is to make sure the switch rating in amps is not exceeded.
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I only have three devices which use this 12v Aux Air Pump: Bathroom Door; Bed Lift; and, Generator Air Bags. I probably don’t need 105 psi; however, my mattress is so heavy, even with the air bed lift, I still need to give it a shove up to get it fully open.
The switch is still working since I cleaned the terminals, but you’ve given me better solutions when the time comes.
I did put some electrical grease on the terminals, but for some reason, the grease was interferring with the unit “sparking” to operate properly. Don’t know why since I’ve used this grease on multiple electrical connections with no issues.
When the time comes, I may install a “well control switch,” but I would definitely have to re-do some pipes, or I’ll just used a sealed unit.
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