Lay-Z-Spa
Overheating / Temperature Overshoot
Lay-Z-Spa heater runs but water overheats beyond the set temperature before shutting off.
Advertisements
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.
Advertisements
Possible Causes
Temperature sensor out of calibration, Sensor not fully in water stream, Stuck heater relay staying on after target temperature, Poor water circulation around sensor
How to Fix / Troubleshooting
Safety first: Do not use the spa if water is excessively hot. Unplug the unit and allow water to cool before entering.
- 1. Verify with external thermometer: Compare displayed temperature with an independent thermometer. Note any consistent difference.
- 2. Improve circulation: Ensure filters are clean and water is circulating strongly when heating. Poor flow can cause hot spots near the sensor.
- 3. Descale sensor area: If accessible, descale the heater and sensor pockets to ensure accurate temperature sensing.
- If overheating continues: The temperature sensor or heater control relay may be faulty. This is a safety-critical issue; stop using the spa and contact Lay‑Z‑Spa support for sensor or pump/heater unit replacement.
Advertisements
Repair Difficulty
Hard
4/5
Required Part
Water Temperature Sensor (NTC Probe)
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements