I don’t think my title is very good but I didn’t want it to be too long
The way that my gas hob works is that I push in and turn
the knob of the burner that I want to use so that the gas starts coming out. When I activate the spark and the burner is lit I can stop pushing in the knob and the gas will keep flowing. If I stop pushing in the knob without lighting the burner then the gas stops flowing immediately, even though I haven’t turned the knob back to zero. Why does the gas not keep flowing like it does when the burner is lit?
In: Other
I know this – there is something called a [flame failure device](https://en.m.wikipedia.org/wiki/Flame_supervision_device)
I know this because our cooker broke, and I diagnosed and replaced a faulty flame failure device. Which, looking back on it, was pretty dumb, as I couldn’t have been more than about 14 at the time. God knows why my parents let me attempt it. Though I guess it worked
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