Control panel displays FLO or FL, jets may run briefly then shut off, heater does not come on, possible blinking heat indicator.

Safety first: Turn off power at the spa disconnect or main breaker before opening any equipment compartment. Never run the spa with closed valves or without water.

• Check water level: Ensure the water level is above all skimmer openings and at the recommended fill line for your Saratoga Spa. Top off if low.
• Clean or remove filter: Remove the filter cartridge(s) from the skimmer or filter well. Rinse thoroughly with a garden hose from top to bottom. For testing, run the spa briefly without the filter (basket in place) to see if FLO clears. If it does, the filter is restricted and should be deep-cleaned or replaced.
• Bleed air from pumps: After a drain/refill, air can be trapped. With power OFF, open the equipment bay and locate the pump(s). Loosen the union nut on the pump discharge a half-turn until you hear air hiss and a small amount of water seep out, then retighten. Do this for the circulation pump and primary jet pump.
• Verify valves are open: Ensure all slice/gate valves on either side of the pumps and heater are fully pulled up/open. Partially closed valves will cause low flow.
• Check flow/pressure switch: Locate the flow or pressure switch on the heater plumbing (usually a small tee with two wires). Inspect for loose or corroded connectors. With power OFF, disconnect and reconnect the spade terminals. If FLO persists with clean filters, proper water level, and bled pumps, the switch may be stuck or failed and should be tested with a meter and replaced if out of spec.

If the FLO code will not clear after these steps, contact a qualified spa technician to test pump amperage and verify heater and control board operation.