I have the same problem. Computer thinks heater isn't heating, but really the circulation pump is not spinning. I can get it spinning by hitting it with a hammer, but then it leaks water out of its housing. If there is no circulation, there is no heat transfer from the heater I'm guessing, and then the dishwasher infers the heater doesn't work but can't detect that the circulation motor is seized.
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UPDATE: yep, the circulation pump was leaking, rusted, and seized. Replacing it fixed the "Heater not Heating" error code and fixed everything else.
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UPDATE: yep, the circulation pump was leaking, rusted, and seized. Replacing it fixed the "Heater not Heating" error code and fixed everything else. It's an easy fix, just be careful not to rip the rubber grommet holding the intake side of the pump. The entire grommet simply slides out of the sleeve it's in. Don't use a screwdriver to pry it out. Just twist and pull it.
I have the same problem. Computer thinks heater isn't heating, but really the circulation pump is not spinning. I can get it spinning by hitting it with a hammer, but then it leaks water out of its housing. If there is no circulation, there is no heat transfer from the heater I'm guessing, and then the dishwasher infers the heater doesn't work but can't detect that the circulation motor is seized.
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+
UPDATE: yep, the circulation pump was leaking, rusted, and seized. Replacing it fixed the "Heater not Heating" error code and fixed everything else.
I have the same problem. Computer thinks heater isn't heating, but really the circulation pump is not spinning. I can get it spinning by hitting it with a hammer, but then it leaks water out of its housing. If there is no circulation, there is no heat transfer from the heater I'm guessing, and then the dishwasher infers the heater doesn't work but can't detect that the circulation motor is seized.