The black knob on my stove for heat come past its sell-by date, in a minute I dont know what my temperature are? as I was turning my oven on, the black knob come off...I...

as I was turning my oven on, the black knob come off...I dont know which is which, what do I do
Does anyone use solar power within their home?
Answers:    Can you turn the knob at adjectives? If so, turn it back to the OFF position (so the oven is completely off). Then, set the knob surrounded by place to where the OFF mark used to sit. The other knobs (if you enjoy other knobs) should all sit surrounded by the off position within the same place.
Cutting down a inert tree?
Buy a alien knob or put that one back if it simply slipped off.