Display shows HTR or HEAT ERR, spa does not heat even though pumps run normally.
Safety Warning
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
How to Fix / Troubleshooting
Safety: Turn off power at the GFCI breaker and verify with a meter that power is off before touching heater terminals.
- Inspect heater connections: Check that the heater wires are tight at both the heater terminals and the control board.
- Look for damage: Examine the stainless heater tube for burn marks, bulges, or leaks.
- Reset high-limit: Some heaters have a manual reset button on the high-limit; press it if present.
Testing heater resistance and live voltage should be done by a qualified technician. If the heater element is open or the relay is not supplying power, replace the heater assembly or control board as needed.
Repair Difficulty
Required Part
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