Service brief

Sundance Spas Optima 880

Serial — · Manufactured —

Reported symptom: panel shows FLO

Matched documentation for: Sundance Spas Optima — Sundance 880 Series family (880 Series documented as including Aspen, Maxxus, Optima, Cameo, Majesta, Altamar, Capri)

Warranty caution

Manufacture date is not readable on the data plate, so unit age cannot be established. Spa/hot tub warranties are commonly limited or voided when the unit is placed in commercial or rental service; no fetched source documented this for this specific model, so the owner must verify against their own warranty document before assuming any coverage.

Try this first

SAFETY: Confirm water is visibly moving in the spa before anything else
Documented instruction: before testing anything, confirm that water is visibly moving in the spa, and never test the heater without confirmed water flow. If no water movement is visible, stop and report to the owner rather than energizing or testing the heater. [3]
Remove the filter cartridge and see whether the FLO message clears
Documented test for the FLO error: if the error disappears with the filter out, the filter is clogged; if it stays, the next documented items to check are the flow switch or the heater circulation pump (those checks are not owner steps). [2]

Documented candidates

Code FLO was reported on the unit's display, so matching was narrowed to that code.

Code	Documented meaning	Documented action	Who	Why shown	Source
FLO ✓	Codes such as FLO, FL, or three blinking dots all indicate insufficient water flow through the heater.	Confirm water is visibly moving in the spa; do not test the heater without confirmed water flow. Documented next checks are the pressure/flow switch test and, if bypassing the switch clears the error, replacing the switch or cable; if not, the circuit board is the likely cause. These checks are service work, not owner steps.	Technician	This is the exact code reported as showing on the unit's panel (FLO), and it is documented as an insufficient-flow-through-heater indication for Sundance spas.	dealer [3]

Warranty

Manufacture date is not readable and the serial is not readable, so no age can be calculated as of 2026-08-18. Age of unit: unknown.

Hot tubs placed in short-term rental / commercial service are commonly excluded from residential warranty terms. No fetched source documented the warranty terms for this model, so this is a caution only, not a statement about coverage.

Verify against your own warranty document