Grundfos STP 3.0B Staying on Constantly


Postby celt2005 » Fri May 05, 2017 2:51 pm

A Chairde

My friend has a GRUNDFOS STP 3.0B pump, and recently when powered up it stays on constantly.

The pump is working, as without it on , the Bath takes three times longer to fill.

No electrical or plumbing work was ongoing at time , or since.

Only way to stop noise is to turn unit off, when switched back on the noise starts immediately. Pump stays off for days on end, so switching ON / OFF does not work

Was wondering if anyone has any ideas?
celt2005
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Postby celt2005 » Sat May 13, 2017 1:14 pm

The pump started worked last Sunday, nothing happened to cause this ... was ON when in use, then turned off afterwards ...

Stopped working again on Wednesday night, the toilet was flushed, and pump stayed on ......
celt2005
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Joined: Fri May 05, 2017 1:56 pm

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