[pairodice]

Not really sure where the ‘white line’ should be on your since there are no markings - maybe turn it half-way to be safe and put a thermometer with a MAX setting (so it will show how warm it’s getting in the bay). You can also test the heater in the bay by putting an ice cube on the copper line near the thermostat - it looks like a long copper wire with a long bulb on the end.