Has anyone put a switch on a refrigerator defrost heater?

I would recommend against it, though it woudl be very easy to do I will recommend against it... here is why:

On my last Residential Fridge (IN my last Residence) said heater failed.

MAJOR REPAIR.. Had to call the appliance fix it guy, Had to find parts he did not have in stock, he replaced the heater, and a fan and some other stuff,

Of course the thing was not working right when it failed.

I do not like paying professionasls for repasir at over 100/hr.