Atlantic Underfloor Heating Zoning or Sensor Placement Issue

Thermostat does not control underfloor heating evenly; some areas too hot, others cold.

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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

Single thermostat controlling multiple uneven zones, Floor sensor not centered in heated area, Incorrect maximum floor temperature setting, Air sensor only mode for UFH

How to Fix / Troubleshooting

Safety first: Turn off power to the heating circuits before modifying any wiring or sensors.

  • Step 1 – Check control mode: Ensure the thermostat is configured for underfloor heating with floor sensor enabled if installed.
  • Step 2 – Review max floor temp: Adjust the maximum floor temperature limit in the installer menu to prevent hot spots.
  • Step 3 – Evaluate zoning: Large or irregular rooms may require multiple Atlantic thermostats and floor sensors for even control. Consider adding additional zones.
  • Step 4 – Sensor placement: If accessible (in conduit), reposition the floor sensor closer to the center of the heated area, away from pipes or external walls.
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Repair Difficulty

Medium 3/5

Required Part

Underfloor Heating Floor Sensor / Zone Actuators
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