Please press play to watch a short video explaining Error Code HL Solid.

HL/Top Light On (Solid): 119ºF Detected at the heater temperature probe.

Possible Causes:

A. Power Interrupted: Water in the heater can reach 119ºF if the flow is stopped suddenly by a power cut (while heating).

B. Air Lock: Air trapped in pump 1 can restrict the water flow through the heater and cause the temperature to reach 119ºF.

C. Cabinet Air Overheated: Long-term continuous use of the pumps can cause the cabinet air (and heater probe) to reach 119ºF.

D. Heater Relay Stuck On: A stuck relay will prevent the heater from turning off before it reaches 119ºF.

E. Pump Relay Stuck On: Heat generated from a stuck pump relay can cause the water and cabinet air to heat to 119ºF.

F. Heater Element Touching Barrel Wall: Heat from the element can transfer through the barrel wall to the probe if incorrectly positioned against the barrel wall.

G. Blocked Flow on Pressure Side: Restricted flow through the heater from a blocked check valve or other obstruction can cause the water in the heater to reach 119ºF.

H. Bad Connection at the Board: The probe cable connection can come loose or the pins can be corroded, blocking the circuit.

I. Pump Fault: An internal pump 1 fault that restricts water flow (such as a broken or blocked impeller) can cause the water in the heater to reach 119ºF.

J. Pressure Switch Not Set Correctly: If the pressure switch has been set too low it will not detect low water flow in the heater and the water may reach a temperature of 119ºF.

The purpose of the pressure switch is to protect the heater from damage and to protect the users from injury by interrupting power to the heater.

K. Extreme Hot Weather Overheating the Cabinet Air and Water: Normal to heavy use of the spa in extremely ho external temperatures can cause the water and cabinet air to reach 119ºF.

L. Heater Positioned Too Close To Pump: If the HL Probe, which is attached to the outside of the heater, is positioned very close to an operating pump, the heat generated by the pump can transfer to the probe causing it to detect 119ºF.

M. VOS on Pump 2: Older model spas with VOS jet plumbing can sometimes cause back pressure on the pump one outlet. This will restrict flow and cause the water temperature in the heater to overheat.

N. Power Supply Problem: Incorrect wiring or fluctuations in the power supply from the power provider can cause the pump to overheat and transfer enough heat to the water and cabinet air for the HL probe to detect 119ºF.

Error Codes