Heater control weirdness
 

I was trying to adjust my heater control to compensate for the warmer temps. Despite the fact that it is a dial, it seems to only have three real modes: 1) Off, 2) Hot, 3) Very Hot. There is an exact point on the dial, just between notch/marker/block 2 and 3 when it switches from cool to hot. Do you think there is any way to make the heater actuation more linear?