119ºF Detected at the heater temperature probe

Power Interrupted: Reset the breaker.
Air Lock: Check that water level is above all the jets and that all jets are open (turn counter-clockwise) &/or loosen union end and re-tighten.
Filter Fault: Check that filters are clean and for large debris in the filters/filter buckets.
High Limit Probe Positioned Too Close To Pump: Check that the heater probe cable is not damaged and properly seated on the heater in the thermal well; positioned pointing away from the pump.
High Limit Cable Connection at the Board: Disconnect HL probe from board (ensure power is off), clean prongs and re-seat up to 3x.
Blocked Flow in Pressure Side: Check for large debris in the wet end of P1 and check valve.
Pump Fault: Check the voltage at P1 low relay.
Heater Fault: Check the voltage at Heater relay.
Extreme Hot Weather Overheating the Cabinet Air and Water: Louvered Doors can be helpful in hot climates to increase air flow within the spa cabinet.
Cabinet Air Overheated: Check filtration settings, turn on Filter Suspend. (filtration will suspend if spa water goes 3 degrees above set temperature)
Heater is Calling for Heat but Pump Does Not Engage - If the Heater Icon on the Topside is flashing but pump is not turning on, first check the Processor Card.

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Error Codes & Remedies-2020 + Custom Series