Fibaro Incorrect Sensor Priority / Floor Control Configuration

Thermostat does not control floor temperature correctly; floor gets too hot or stays cold while air is comfortable

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Possible Causes

Thermostat set to air sensor only in underfloor heating application, Maximum floor temperature limit misconfigured, Floor sensor not properly embedded or located, External sensor selected instead of floor sensor

How to Fix / Troubleshooting

Safety first: Configuration‑only; no wiring changes required.

Steps to optimize floor temperature control:

  • 1. Check control mode:
    • In the Fibaro settings, ensure the thermostat is configured for floor + air control if underfloor heating is used.
  • 2. Set floor temperature limits:
    • Adjust maximum and minimum floor temperature limits appropriate for your floor covering (e.g., max 27–29°C for wood).
  • 3. Verify sensor selection:
    • Confirm that the correct floor sensor input is selected and that an external room sensor is not mistakenly used for floor control.
  • 4. Allow stabilization time:
    • Underfloor systems have slow response; wait several hours after changes to evaluate performance.

When to call a professional: If floor temperatures remain uneven, a heating specialist can check insulation, pipe layout, and system balancing.

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Repair Difficulty

Easy 2/5

Required Part

Fibaro NTC Floor Temperature Sensor
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