OH
Villeroy & Boch
Overheat Condition Detected
Display shows OH, spa shuts down pumps and heater, water feels very hot
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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
Blocked filters in Villeroy & Boch filter housing, Stuck heater relay causing continuous heating, Failed temperature sensor reading low, Poor ventilation around spa equipment compartment
How to Fix / Troubleshooting
Safety: Do not enter the spa when OH is displayed. Turn off power at the breaker and allow water to cool.
- Remove cover: Take off the Villeroy & Boch spa cover to allow heat to dissipate.
- Clean filters: Remove and thoroughly clean all filters. Consider soaking in filter cleaner if heavily soiled.
- Check for continuous heating: After water cools and power is restored, monitor the heater indicator. If the heater remains on even when set temperature is reached, the heater relay may be stuck.
- Verify circulation: Ensure the circulation pump is running and that there is strong flow from the designated circulation outlet.
- Ventilation: Confirm that the equipment bay ventilation openings on the Villeroy & Boch cabinet are not blocked by decking or insulation.
If OH recurs frequently, have a technician test the temperature sensor and heater relay and replace as needed.
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Repair Difficulty
Medium
3/5
Required Part
Heater Relay / Control Board
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