Answer
Sep 06, 2025 - 10:56 AM
On a hot tub, "HL" usually stands for "Heater Low" or "High Limit." It is an error code indicating that the water temperature is too high or there is a problem with the heating system. You should turn off the hot tub and consult the user manual or a technician to prevent damage or safety risks. It can also refer to 'Healthy Living', a line of Master Spas.
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