Hot Spring Circulation Pump Mechanical Failure

Circulation pump is noisy, rattling, or not moving water; heater errors like FLO or LF appear.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn SilentFlo pump bearings, Debris in pump impeller, Air lock in circulation line, Voltage issues to pump

Safety first: Turn off power at the breaker before working on the pump.

Bleed air: Loosen the union on the SilentFlo circulation pump to release trapped air, then retighten and test.
Listen for bearing noise: A grinding or squealing sound indicates worn bearings and the pump should be replaced.
Check for leaks: Inspect around the pump shaft and unions for water leaks that may have damaged the motor.

Circulation pumps are typically replaced as a complete assembly rather than rebuilt.

Medium 3/5

SilentFlo 5000 Circulation Pump

Check Price on Amazon

We may earn a commission from links on this page.