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John, Home Appliance Technician
Category: Appliance
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Experience:  Appliance repair business owner for over 43 years.
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Samsung 400 RHS Heavy and Smart Auto lights flash after

Customer Question

Samsung DMT 400 RHS Heavy and Smart Auto lights flash after filling, then empties dishwasher
Submitted: 1 year ago.
Category: Appliance
Expert:  MRANSWER replied 1 year ago.

This indicates an overfill condition. The main board or case sensor assembly is bad here. Pull the unit out and remove the metal cover on the left side and see if you see any signs of leakage from the opaque plastic case sensor assembly- if you do then I would replace it. Disconnect the wire harness from the top of the assembly and see if the unit starts- if it does then replace the case sensor and if it does not then replace the board.

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