The problem is, Monica thinks that because the red light is on in the kitchen, then we must be burning gas, this is NOT the case. The red light only means that the timer is on and that if the water is below the required temperature, then and only then will the gas come on, it's thermostatically controlled, just like the heating. If it's warm enough, then the gas will not burn, even if the red light is on and dancing a jig in the kitchen!

Maybe one day she will understand.