I can't tell what type of unit you have, but my Seneca has 3 water pump switches. The third is in the wet bay outside. On my unit, if any are on the pump runs, they do not work like home 3-way light switches.
And with the unit winterized it may never be able to draw a suction and shut off on its pressure switch like it would in normal operation.
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Rob R.
Akron, OH
2014 Seneca 37TS
Toads: 2019 Ford Edge ST or 2013 Ford Focus ST
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