Aftermarket digital pump controller displays PF and the Hayward PowerFlo pump will not run.

Safety first: Shut off power at the breaker and verify the pump is de‑energized.

• Allow motor to cool: If the PowerFlo motor housing is very hot, allow it to cool for 30–60 minutes. Many motors have an internal thermal overload that will reset when cool.
• Inspect motor capacitor: Remove the rear motor cover on the PowerFlo and visually inspect the start/run capacitor. If it is bulged, leaking, or cracked, replace it with an identical µF and voltage rating.
• Check continuity: With the motor disconnected and using a multimeter, check continuity across the motor windings per the wiring diagram on the PowerFlo motor label. Open or shorted windings indicate a failed motor.
• Reset controller: After any repair, reconnect the motor, restore power, and clear the PF code on the controller. If PF persists with a known-good motor, the controller may be at fault.

Motor electrical testing should be done by a qualified technician if you are not experienced with electrical diagnostics.