A disposal that hums but does not spin is jammed, not broken. Here is how San Mateo homeowners can clear it safely.
Why it hums
The motor is getting power but the grinding plate cannot turn — a jam. Continuing to run it can burn out the motor.
Turn it off first
Unplug the disposal or switch off its breaker before doing anything. Never reach inside.
The wrench method
A hex wrench in the socket on the bottom lets you rock the plate back and forth to free the jam.
The reset
After clearing, press the reset button on the bottom and try again. mineral-rich water varies by region, and older neighborhoods still run on aging galvanized or copper lines In San Mateo, a stubborn jam is a quick pro fix.
Get it grinding
If it still hums, stop and call. Call 888-217-3585 and San Mateo Plumbing Pros will match you with a San Mateo pro.
Plumbing in San Mateo: what to know
In San Mateo, mineral-rich water varies by region, and older neighborhoods still run on aging galvanized or copper lines. Pros in our network know the local quirks and bring the right parts on the first visit.
Across San Mateo County — from Hillsborough, Foster City and Belmont to ZIP codes like 94401, 94403, 94402 — homeowners deal with the same kinds of issues. The tips above apply locally, and when a job goes beyond a quick fix, a vetted local pro is only a call away.
Need a hand in San Mateo?
If a plumbing issue is beyond a quick fix, don't wait for it to get worse. Call 888-217-3585 and San Mateo Plumbing Pros will match you with a vetted local pro — usually within minutes. Learn more about plumbing help in San Mateo.