1. Loud grinding, screeching, or humming
A healthy pump produces a steady low hum. If you hear grinding, screeching, or a high-pitched whine, the bearings are likely worn out. Humming without the motor spinning usually means the capacitor has failed or the impeller is jammed. Neither issue fixes itself — and running a pump with bad bearings will burn out the motor entirely.
2. The pump keeps losing prime
If your pump basket fills with air instead of water, or you see air bubbles shooting from the return jets, the pump is losing prime. Common causes include a cracked pump lid, worn lid o-ring, air leak on the suction side, or a clogged impeller that can't pull water effectively. This is one of the most common issues we see on service calls across Peabody, Danvers, and the North Shore.
3. Reduced water flow
Weak return jets or slow skimmer pull can mean a clogged impeller, blocked filter, or a failing motor that can't generate enough pressure. Before assuming it's the pump, check your filter pressure gauge — if that's normal but flow is weak, the pump itself is the likely culprit.
4. Visible leaking around the pump
Water dripping from the pump body, around the shaft seal area, or from pipe connections means something has failed. The shaft seal is the most common leak source — it sits between the motor and the wet end and wears out over time. A shaft seal replacement is a straightforward repair. Cracks in the pump housing itself usually mean it's time for a replacement.
5. The motor trips the breaker
If your pump motor trips the circuit breaker repeatedly, the motor is drawing too much current. This can be caused by a locked rotor, bad capacitor, corroded wiring, or an overheating motor with failed ventilation. Do not keep resetting the breaker — this is a fire hazard. Turn it off and call a professional.
Repair or replace?
Repair if: The pump is less than 8 years old, the issue is a gasket/seal/impeller/capacitor, and the motor runs smoothly otherwise.
Replace if: The motor is 10+ years old, has multiple issues, or you're running an old single-speed pump. Upgrading to a variable speed pump can cut energy costs by up to 80%.
Our pool pump repair service includes a $150 diagnostic call that covers common repairs like impeller cleaning, gasket replacement, and shaft seal repair. We'll tell you honestly whether repair or replacement makes more sense for your situation.
Pool pump acting up?
$150 service call covers diagnosis and common repairs. CPO certified.