Pump Won't Turn On
Check the breaker first - tripped breakers are the most common cause. If power is reaching the pump but it won't start, the capacitor or motor windings may be failed. This usually requires professional diagnosis.
Pump Loses Prime
Air leaks in the suction line, a clogged impeller, low water level, or a cracked pump lid can all cause loss of prime. Check the pump lid o-ring first - it's the most common culprit and costs under $15 to replace.
Pro Tip
Apply a thin layer of silicone lubricant to your pump lid o-ring every few months to extend its life.
Unusual Noises
Grinding or screeching sounds typically indicate worn bearings. A humming noise without rotation suggests a seized motor. Cavitation noise (sounds like gravel) means the pump is starving for water - check for blockages.
Pump Leaking
Leaks from the pump housing, shaft seal, or plumbing connections are common. Shaft seal replacements cost $150-$300 and are one of the most frequent pump repairs.
Low Flow or Weak Pressure
A dirty filter, clogged impeller, undersized pump, or air leak can all reduce flow. Clean the filter first, then check the impeller for debris.
Pump Runs But No Flow
If the motor is running but water isn't moving, the impeller may be broken or completely clogged. This requires opening the pump housing - a job for most capable DIYers or a quick pro repair.
When to Repair vs Replace
If your pump is under 5 years old, repair is usually worth it. For pumps over 8-10 years old, especially single-speed models, replacement with a variable-speed pump often makes more economic sense due to energy savings of 60-80%.