Display shows OHt or HOT, heater shuts off but pumps may continue to run.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Scale buildup inside heater, Restricted flow at heater, Failing heater thermostat circuit, Sensor reading high at heater outlet

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

Descale heater (advanced): If your Clearwater Spas unit is in a hard water area, consider having the heater inspected and descaled by a technician.
Improve flow: Clean filters, check valves, and ensure circulation pump is operating correctly.
Monitor temperature: Use an external thermometer to verify actual water temperature versus displayed.

Persistent OHt errors may require heater or sensor replacement.

Hard 4/5

Heater Assembly

Check Price on Amazon

We may earn a commission from links on this page.