Codes: Why does the HL code stay on?

Question: Why do we keep getting the HL code on the pad even though the tub is not hot yet. After a clean and refill we turned it on and still get the HL code.

Answer: The HL code can be caused by the PC board, Sensor, or Heater. Most often cause is the PC board or sensor. In order for the heater to cause this error it has to be bad and no GFCI or bad GFCI installed in the electric. If you have a GFCI breaker installed and it trips when you push the test button then it is the board or sensor. The only way to tell is to plug a new sensor into the board and see if it works.