Light all surface burners.
Turn the knob on the burner being adjusted to Lo.
Remove the knob.
Insert a small, flat-blade screwdriver with a minimum length of 3" (76.2 mm) and a diameter of 3/32" (2.4 mm) into the valve shaft.

Valve shaft
Center adjustment screw
Turn the screw to adjust.
Hold the valve shaft with one hand while turning the screw to adjust with the other.
Replace the knob.
Test the flame stability.
Test 1: Turn the knob from Hi to Lo quickly. If the flame goes out, increase the flame size and test again.
Test 2: With the burner on a Lo setting, open and close the oven door quickly. If the flame is extinguished by the air currents created by the door movement, increase the flame height and test again.
Repeat steps 1-7 for each surface burner.