Troubleshooting Samsung Dishwasher DMT300RFS Heater Error

New Samsung dishwasher DMT300RFS shows "heater error". Just installed this unit one month ago. What are the common causes for this error

JAXAL wrote

If you’ve tried running an empty cycle with detergent, as recommended in the User Manual, and the problem persists, please turn off the circuit breaker and call 800-SAMSUNG to speak with an agent who can help with scheduling service. The technician can help determine what the cause of the error is.


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