The self-test of the GFCI (ground fault circuit interrupter) failed.
Perform a reset of the circuit breaker.
- Find the circuit breaker connected to the unit.
- Disable it.
- Wait about 30 seconds.
- Reactivate the circuit breaker.
Issue not solved?
- Ask your installer or a certified electrician to check if your underfloor heating has been short-circuited.
- If possible: interchange your thermostat with another functional thermostat. Then check if the problem comes from the thermostat or the installation.
If the floor heating seems to be working fine and the problem appears to be coming from the thermostat, contact the technical support service.