Display shows SPAO4; heater fan/inducer runs continuously without firing

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

Relay on SmartPool control board welded closed, Control board logic failure, Shorted wiring to inducer

Electrical caution: Continuous fan operation indicates a control fault. Disconnect power before inspection.

Power cycle: Turn off the breaker for 2 minutes, then restore power. If the inducer or fan starts immediately without a call for heat, the relay is likely stuck.
Inspect wiring: Check the inducer/fan wiring harness for shorts or melted insulation that could be backfeeding power.
Board replacement: A stuck relay usually requires replacement of the SmartPool main control board. This is typically a professional repair.

Hard 4/5

SmartPool Main Control Board

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