Display shows OHt and spa intermittently shuts off heater; water may not reach set temperature.

Safety: Turn off power if you suspect overheating or smell burning.

• Clean filters and check flow: Ensure RivieraPool filters are clean and that all jets and valves are open to allow proper flow.
• Inspect heater manifold: Look for kinks or restrictions in plumbing near the heater. Check for scale buildup if you have hard water.
• Reseat sensors: Make sure both temperature and high-limit sensors are fully inserted into their wells and making good thermal contact.
• Monitor heating: After power-cycling, observe how quickly the temperature rises. If OHt appears repeatedly, consider replacing the sensors and inspecting the heater for internal restrictions.