Display shows FLC or FLOC and heater is disabled.

Safety: Turn off power at the GFCI before touching any wiring or plumbing.

• Inspect flow switch orientation: Locate the flow switch on the plumbing near the heater. Ensure the arrow on the body matches the direction of water flow as per Canadian Spa Company installation.
• Check for debris: If the switch has a removable cap or union, open it carefully and inspect for debris or scale that could jam the paddle. Clean gently and reassemble with proper seals.
• Inspect wiring: Follow the flow switch cable to the spa pack. Look for crushed insulation, rodent damage, or water intrusion at the connector. Repair or replace damaged wiring.
• Reset power: After reassembly, turn power back on and see if FLC clears.

If the error persists, the flow switch contacts may be welded closed or the control board input may be faulty. Replace the flow switch with a Canadian Spa Company-compatible part. If a new switch does not resolve it, the spa pack may require professional diagnosis or replacement.