Record the exact message before changing anything
Photograph the display, including punctuation, flashing indicators and any alternating temperature reading. Note the time and what the spa was doing. Record the make, model and year; if a controller was replaced, tell the technician because the original manual may no longer describe that display.
A search for a code without its brand can produce a convincing but irrelevant answer. Find the manufacturer's document for the installed equipment and use the section intended for owner checks.
Common warning families
| Search phrase | Useful information to record |
|---|---|
| FLO or flow error | Exact message, water level, recent filter care, and whether it followed a refill. |
| OH or overheat warning | Displayed temperature, operating mode and when the warning appeared. Stop using the spa until resolved. |
| Sensor or high-limit fault | Full code and whether it recurs. Do not bypass the sensor or protective control. |
Do not erase a recurring fault with repeated resets
A cleared display does not prove that the underlying condition is corrected. Record each recurrence and any relevant operating change. Use a reset only where the exact owner instructions call for it and the stated conditions are met; repeated breaker trips belong with a qualified professional.
Prepare a useful diagnostic request
Send the display photo, model identification, symptom timeline and a short list of owner checks completed. Mention loss of heat or circulation and freezing conditions at your Okotoks property. Ask whether the company services the installed controller and can obtain its parts.
Does a sensor error mean I need a new sensor?
Not necessarily. A code does not provide enough evidence for a remote parts prescription. Ask the technician to explain the diagnosis and the scope of any replacement before approving the quote.
Can I keep soaking when the warning disappears?
Follow the manufacturer's conditions for returning to use. If a fault is recurring or you cannot establish normal operation and suitable water conditions, leave the spa unused and seek advice.
Sources and further reading
Sources checked November 11, 2026. Manufacturer examples are not universal procedures; use the current manual for your model.