Quote:
Originally Posted by mikreb
Dishwashers have a heating element that heats the water to 130-140 degrees it doesn't use hot water from the water line. If dishes aren't coming clean check the filter or you may have a spray arm that is not working properly.
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Yes, they have a heating element to BOOST the hot water temp. They ARE (in most cases) installed using the hot water side of your kitchen sink , teeing off of the hot water line. My original statement still stands.
You are correct that there are many causes of dishwashers not working properly, one being clogged spray arm holes, etc. Often it is user error. Here is a good link;
Dishwasher Not Cleaning Dishes? Here’s What to Do