does a heating element get weak or is it a works or doesn't work like a light bulb for example
Answer Glen, In a dishwasher, the element itself 99001995 either works or doesn't. There are other components involved in the heater circuit that may have failed. the hi limit switch 99001852 control switch 99001861 and timer 12001533. On an older unit like this, you also want to check the wiring harness at the bottom of the door, where the harness transitions from the door to the tub. The wires could be damaged or broken where the wires enter or exit the retainer.
Is this/these O-ring(s) the only water seal for the heating element?
Answer Hello Ted! The heater o-ring Y913079 is used to seal the water. The nut 99002208 is used to apply the pressure to seal it. Thanks!