Q.The room temperature rises up to 25℃ even I set as 18℃. Is this malfunction?

Failure Check / Laser FF Heater (Direct Vent)

A.It is not malfunction. It is specification of the product.

Our FF heaters continues weak combustion during normal operation if the room temperature reaches set temperature. The room temperature may exceed set temperature if weak combustion continues in spring or autumn, when the normal temperature is high. The same phenomenon may occur in small room or high airtightness room. In such a case, use ECO mode.