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Yes it heats its own water with a coil. So far has done well cleaning without prewashing dishes. Good detergent like Finish tabs is a big factor too according to Consumer Reports. If it didn't then I would get the water hot 1st at the tap but haven't had to do that.
Sorry, there was a problem. Please try again later.Hello Kerry! Yes, you would need to run the water before you start the unit. Thank you for your inquiry on our Whirlpool appliances.
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