What are common signs of a failing well pump?

• A. Increased water pressure and louder pump.
• B. No or reduced water flow, frequent cycling, noisy operation, overheating, or cavitation.
• C. Stable flow with no noise.
• D. Lower electrical consumption.

Answer: (B)

Common signs of a failing well pump include no or reduced water flow, the pump turning on and off frequently, noisy operation, overheating, and cavitation.

No or reduced water flow means the pump isn’t delivering the usual amount of water. This can come from worn impellers, a clogged intake, a blocked line, or loss of prime, all indicating the pump is struggling to move water.

Frequent cycling—the pump repeatedly turning on and off—usually points to issues with the pressure switch, a leak in the system, or insufficient water pressure in the tank. It’s a sign the system is working too hard to maintain pressure.

Noisy operation, such as banging, grinding, or screeching, often means worn bearings or loose components, or cavitation. Cavitation occurs when air bubbles form in the water and collapse inside the pump, causing loud noises and accelerated wear.

Overheating happens when the motor is overworked or lacks proper cooling, which can happen with a restricted discharge path, excessive demand, or motor faults.

Cavitation is a specific problematic condition where rapid pressure changes create vapor bubbles in the liquid; as these bubbles collapse, they cause shock waves that damage impellers and degrade performance, producing that loud, banging sound and poor flow.

These signs together strongly point to a pump that's failing or nearing failure. If you observe them, shut the system down and seek professional inspection to prevent further damage.