-- Hi 

Failure Check / Laser FF Heater (Direct Vent)

「Meaning of display」

  • Room temperature is above 36°C.
  • The room thermistor is not installed in the correct position.
  • The room thermistor is defective, disconnected, or missing wires.


  • Check the installation position of the room thermistor and move it to the proper position.
  • If the unit continues to operate repeatedly after the above measures have been taken, the problem requires repair. Please contact the dealer where you purchased the product for the “digital display” (error display), etc.