Cove · Dishwasher error code

90 01 53Control firmware not compatible (MCM / UIM)

Cross-checked Power off, standard tools

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Related diagnostic guides

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The control lock blocks the keys. It is turned off with a key combination that differs by model.

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First rule out blocking dishes, caked detergent and an unfinished cycle. Then test the dispenser actuator (a wax motor or bimetal/solenoid on most units) for an open circuit, and check whether the control sends 120 V to it during the wash. A cup that opens but leaves detergent behind is a wash problem, not a dispenser problem.

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Confirm the supply water is hot first, then test the heater (or Bosch heat pump heater), the high-limit and the thermistor. If all test good, suspect the heater relay on the control.

5 steps ~60 minmoderate