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Can I get the model number so I can see what can cause your dishwasher to not heat? The model would be located on a sticker around the front frame of the tub and can be seen if you open the door.
OK so on this model if dishwasher isn't heating, you either have a bad heater, bad timer, or bad high limit thermostat. You'd need a multimeter to test the heater and the high limit thermostat to determine if they have continuity through them or not. You'd need to remove the lower bottom access panel to access these parts. If either part doesn't have continuity then replace it. If both parts have continuity you'll need to replace the timer.
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