noP
Heatit
No Load Detected on Output
Display shows "noP" and thermostat does not detect any load
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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
Heating cable not connected to thermostat, Loose load terminal screws, Load connected to wrong terminals, Open circuit in floor heating cable
How to Fix / Troubleshooting
Safety first: Turn OFF power at the breaker before checking wiring.
Steps to troubleshoot:
- 1. Verify load wiring:
- Remove the thermostat and confirm that the floor heating or panel heater is connected to the correct load (OUT) terminals.
- Tighten all terminal screws.
- 2. Check continuity of load:
- With power OFF, disconnect the load wires and measure resistance between them.
- If the circuit is open (infinite resistance), the heating element is broken and must be replaced.
- 3. Confirm correct terminal usage:
- Ensure the neutral of the load is connected as specified (often to N terminal or directly to supply neutral).
- 4. Test with known good load:
- Temporarily connect a test lamp or resistive load (by a qualified electrician) to verify thermostat output.
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Repair Difficulty
Hard
4/5
Required Part
Floor Heating Cable / Panel Heater
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