On Wednesday, I was doing some DIY work down in the (unheated) basement,
when I started hearing a low whirring sound once in a while..
It was random and only lasted 3 or 4 seconds.
It took a while to find the source of the noise. It was the sump pump in the laundry room.
I checked it out. The hole was bone dry and the dual-floats were down.
Lifting a float caused normal operation. The pump would run and stop 10-15 seconds,
after the float was dropped.
BWC1 dual float controller
I'm not sure what was causing the short runs (3 or 4 sec)..
So, I called Glentronics Tech support.
Glentronics Customer Support
645 Heathrow Dr
Lincolnshire, IL 60069
800-991-0466
These pumps have a 3 year warranty, so they send me a replacement BWC1 controller unit.
The new BWC1 was delivered this morning (Saturday) and has been installed and tested.
That's Fast service! I highly recommend this company!
Basement Watchdog Battery Operated Backup Sump Pumps Home Page
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I'm not sure what caused the problem, but I suspect it may have been
caused by RFI from a nearby AM radio station.
One idea was maybe the coldness down in the sump hole caused
the plastic parts to shrink enough to bring one of the float magnets
within range of the sensor (Hall-Effect?)..
But it seems like that would also cause the delayed 10-15 second 'after-run'
that cleans out the bottom of the sump..?.
I'll have to remove the cover and check the PCB for bad solder connections etc..
If I find the problem, I'll have a spare controller.. Always good to have, just in case..
Wel-Bilt Submersible Pump — 21.13 GPM, 1/8 HP, 1in. | Submersible Utility Pumps | Northern Tool + Equipment