If the temperature of the outgoing air exceeds 105oC (the temperature is measured by the sensor), the heating elements will be turned off. The fan in the heater will run, the heating elements will remain disconnected. To enable the heaters to work, press the RESET button located on the front panel of the heater, next to the thermostat knob.
ME 3.3, ME 9 and ME 15 heaters with a capacity of 3.3; 9 and 15 kW are equipped with manual RESET. On the other hand, the ME 22 kW model has an automatic reset. It differs from the manual RESET in that after the device is turned off and it has cooled down, it will automatically reset and the heater will be ready for operation. The most common cause of this function is a power failure during the heater operation, causing the temperature inside the device to rise as a result of the fan stopping or turning the device off without cooling down for 3 minutes.