Description & Operation: Function

The heater is in standby position in key position 2 (terminal 15). heater is switched on by thermostat at ambient temperatures below 5° +/- 3°C. The heater continues operating up to an ambient temperature of 15° +/- 3°C. and switches off after this temperature is reached. If temperature again drops below 5° +/- 3° C. This operating cycle is repeated until ambient temperature at mirror is always above 5° +/- 3 ° C, or if key is turned to position "1" or "2".