I think the temps less stable on top shelf but I never saw it above 40 ...luckily it's a newer model fridge. Halfway efficient
Not actually what I meant by "Stabilize".
I meant once it's stabilized, if the air temp cycles from 33° to 40° to get 37° in the water, it will always cycle from 33° to 40° to get 37°. If it then drops to 32° and 39° the result will be 36° in the water.
If you have to make an adjustment, make it very small. It takes time to settle down.
Bear