What does error code FLO mean on a Gecko hot tub?

No water flow. No water flow was detected while the main pump was running.

Can I fix Gecko code FLO myself?

Start with these safe checks: Make sure the circulation valves are open and the water level is high enough. Turn the spa off at its breaker and make sure nothing is blocking the filter. If air is trapped, Gecko says to start the pump and slowly loosen a union nut to let the air out, then tighten it. Gecko lists a minimum flow of 18 GPM. In.flo cable, configuration and heater wiring checks are tech steps.

When should I call a technician for code FLO?

Gecko lists a minimum flow of 18 GPM. In.flo cable, configuration and heater wiring checks are tech steps. Water and electricity together can kill. Turn the equipment off at the breaker before you open anything, never touch equipment while standing in water, and stay out of the pool or spa if you feel tingling or suspect an electrical problem. Leave wiring, boards and GFCI faults to a licensed electrician or service tech.

Gecko Hot Tub Error Code FLO / FLO: No water flow

What FLO means

No water flow was detected while the main pump was running.

Also shown as: FLO, depending on the model.

Likely causes

Closed valves
Low water
Blocked filter
Air trapped in the plumbing
Heater pump not running

Safe first checks

Make sure the circulation valves are open and the water level is high enough.
Turn the spa off at its breaker and make sure nothing is blocking the filter.
If air is trapped, Gecko says to start the pump and slowly loosen a union nut to let the air out, then tighten it.

When to stop

Gecko lists a minimum flow of 18 GPM. In.flo cable, configuration and heater wiring checks are tech steps.

Parts that may help

Only order a part once the checks above point to it, and match the part number to your model.

Clarathon FC-2320 Spa Filter PRB14.5 C-2302$21.99

Checked against: Gecko Alliance Y-series and in.xe troubleshooting guide (9919-101313-D, July 2023). Codes can differ by model and year, so confirm with your owner's manual.