Htr
Lifesmart Spas
Heater Circuit Error
Display shows HTR or HEAT ERR, heater does not operate correctly or shuts off prematurely.
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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.
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Possible Causes
Failed heater element in stainless heater tube, Burned heater relay on control board, Loose heater terminal connections, Tripped high-limit sensor
How to Fix / Troubleshooting
Safety first: Turn off power at the GFCI breaker and verify with a meter before touching heater wiring.
- Inspect heater terminals: Open the control pack and check the heater element terminals for signs of burning, looseness, or corrosion. Tighten gently if loose.
- Check for leaks: Look for water leaks around the heater tube that could cause corrosion or shorts.
- Test heater resistance: With wires removed, measure resistance across the heater element using a multimeter. Compare to the expected value (typically 8–15 ohms depending on wattage). Infinite or zero ohms indicates a bad element.
- Inspect control board: Look for burnt spots near the heater relay on the Lifesmart control board.
- Replace heater: If the element is faulty, drain below heater level, remove unions, and replace the heater assembly with a compatible Lifesmart stainless heater tube.
- Board replacement: If the relay is burned or not switching, the control board will need replacement by a technician.
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Repair Difficulty
Hard
4/5
Required Part
Heater Assembly
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