Humming Control Box

[Jluksic]

I have a Red Jacket Control Box that seems to "humm" rather loudly whenever there is a demand to turn on the submersible pump. Do all control boxes make noise or could this be an indication of capacitor gone bad???

 

[Speedbump]

If it humms through the entire cycle, it could be the old potential relay that was used years back on the smaller pumps. 1/2hp to 1.5hp to be exact. The newer solid state relays don't make any noise at all.

Is it possible you have a larger than 1.5hp pump and your control box has a contactor? If so, contactors tend to vibrate when they get old and rusty.

bob...