Started using shore water a couple of weeks ago - turned off and vented when we leave the boat, so no pressure being applied when we're not around. Water pump breaker open whenever we're not there.
Wanted to test the water pump for pre-underways for an upcoming trip and no joy. Shore water off (did not vent), closed water pump breaker ... no pump noise and then about five seconds later pump breaker opens.
My trouble shooting plan of attack.
To make sure pump works. I plan on disconnecting pump output before pressure tank and allow to go into bilge.
- Step one: Attempt with power coming in normally, to the pressure switch which should sense no pressure (and thus be closed) since the pump discharge will just be into the bilge. If that works then I think there is something in the pressure tank that's screwy?
- Step two: If 'normal' power input doesn't work, assuming bad switch, will apply power directly to motor input, bypassing pressure switch. If pump runs, then assume bad pressure switch and replace.
- Step three: If 1 & 2 don't work, assume bad motor/pump and replace whole unit.
Am I missing something? Thoughts? Thanks in advance.