Thermostat fails to detect or control an external floor sensor; floor temperature never changes from a default value.
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.
Possible Causes
How to Fix / Troubleshooting
Safety first: Turn OFF power at the breaker before accessing sensor wiring.
Steps to check:
- Enable floor sensor mode: In the Mysa app or on the thermostat, ensure the control mode is set to use the external floor sensor (if required by your installation).
- Verify wiring: Confirm the two sensor wires are connected to the dedicated sensor terminals, not to LINE or LOAD.
- Measure sensor resistance: With the sensor disconnected, measure resistance across its leads and compare to the specification at room temperature.
If the sensor is good and correctly wired but the thermostat never reads it, the sensor input circuit is likely defective. Replace the thermostat.
Repair Difficulty
Required Part
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