heatingdial

noun
UK /ˈhiːtɪŋ ˈdaɪəl/
US /ˈhiːtɪŋ ˈdaɪəl/

A small round knob you turn to make a heater warmer or cooler.

Turn the heating dial to the right to make the room warmer.


OTHER MEANINGS

2. The numbered dial on an oven that sets how hot it gets.

Set the heating dial on the oven to 200 degrees.

3. A control knob on a car dashboard for the car's heater.

She turned the heating dial up because the car was cold.

4. A dial on a water heater that controls how hot the water becomes.

The plumber adjusted the heating dial on the water tank.