Why Is My Well Pump Running Constantly?

Common causes

• Waterlogged pressure tank — the most common reason; the system can’t build pressure, so the pump keeps running.
• Bad pressure switch — it never tells the pump to shut off.
• A leak — a running toilet, dripping fixture, or underground line leak keeps demanding water.
• Worn or undersized pump — it can’t reach cut-off pressure.
• Dropping water level / well issue — less common, but possible.

Why you shouldn’t ignore it

A constantly running pump overheats, spikes your power bill, and wears out fast — the motor isn’t built to run non-stop.

What to do

Rule out leaks first (check toilets and fixtures). If there’s no leak, it’s usually the pressure tank or switch — both are repairable, often the same day. A pump that’s been running for days is on borrowed time, so don’t wait.