How hot is a fridge defrost element supposed to get? I placed a thermometer near my defroster under the coil while defrosting for about 3 minutes and it peaked at 170 degrees F (N.B. It was in defrost mode for about ~20 minutes and there was some ice on the coil; my timer's defrost cycle is ideally 7 minutes but I'm bypassing the bimetal and thermal fuse so it was actually defrosting for ~20 mins before my thermometer check).

Side note: When I tested the resistance of the defrost element at 200, I got 91.8.

1) Is 170°F within the normal range?

The fridge is a 10-15 year old Frigidaire, model FRT163AW - I can't find any service manuals online/tech sheets and I'm attempting a DIY repair. I know the timer and thermal fuse is broken but just wondering if the heating element is good.

2) Can a heating element be partially broken where it heats suboptimally? Or is it an all or nothing thing device where it's either the heating component is either connected or not (if that makes sense)?

Thanks for any feedback!