Error Code
SP IN error code — Gecko spa
Always cut power at the breaker before opening the spa pack or touching wiring. Spa equipment runs at 120/240V and can be lethal. If you are unsure, hire a licensed spa technician.
SP IN points directly at the pressure switch circuit — the switch itself, its wiring, or the pump that should be making pressure. It's a narrower version of FLO with the same cheap-first diagnosis.
What SP IN means
Spa input pressure switch problem.
Diagnose in order
- Pull and inspect the filter cartridge — a clogged filter is the most common cause by far
- Bleed any air lock at the pump union until water runs steady
- Test the pressure/flow switch — a $15–30 part and an easy DIY swap
- Verify every diverter valve is fully open
- Listen to the circulation pump — humming with weak jet flow means it's failing
- Only then suspect the heater — a heater replaced on top of a flow problem fails again in weeks
Likely failed parts
Frequently asked questions
Related codes & guides
Not sure which part failed?
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