The max/min gas flame is for adjustment of temperature when using the fridge on gas. The next one with 0 to 7 is possibly the electrical thermostat. I am not familiar with this exact model. One of the dials will be able to be pressed in. The idea is to press and hold this button in for about a count of five, then push the lighter strike. You will hear a click noise which is when a spark is delivered to the burner area. Some fridges have a small window or guage which shows if the flame has lit. You may have to look down the chimney. You keep holding the press button down after having depressed the lighter strike button for about five seconds. This allows gas to flow to the burner while the thermocouple heats up. Once the thermocouple (which is a small copper probe sticking almost into the flame) heats up, it will keep the gas valve open and if you then release the button, the flame will continue burning. The idea is that if the flame were to blow out, the thermocouple would cool and in turn act as a safety by shutting off the gas supply. Hope this is enough info.