This is an under counter DW. The heating element on the bottom of the DW is broken and I need to replace it. To do so, how do I take it out and put another one in. Please don’t tell me I will have to go underneath the DW or take it out. 
(Actually I do not know the age. It came with the house.)
Thanks.
The tub is made of plastic. The heating element is shaped nearly like a horse shoe. The connections are in the back half on the bottom of the tub. Would I need washers as well?
Sorry for the delay. Unfortunately you do have to remove the dishwasher from the cabinet unless your arms are long enough to reach the nuts, secured the heating element. Washers are included with the new heater.
Gene.