FL1 code; spa will not heat and may run circulation pump continuously.

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

Dirty filter, Air lock, Weak circulation pump, Stuck-open flow switch

Safety: Turn off power at the breaker before opening the equipment bay.

Clean filter: Remove and rinse the Hanscraft filter thoroughly. Replace if old or damaged.
Bleed air from pump: Loosen the circulation pump union to release air until water flows, then retighten.
Tap flow switch gently: Locate the flow switch on the heater line and gently tap the body with a non-metallic tool to free a stuck paddle (if applicable).

If FL1 persists with good flow, replace the flow switch with a Hanscraft-compatible unit.

Medium 3/5

Hanscraft Flow Switch

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