Question about Kuppersbusch Dishwashers

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Dish washer fail to activate the cleaning pills.

Dishwasher Kuppersbusch Model IG 669.2 fails to activate the cleansing tablets. They drop to the bottom of the main chamber during operation, but do not dissolve. No apperent cleaning is manifest. In most cases, appliance operation is cut-off before final step is attained. Heating is activated; Clean water supply is OK; Used water is pumped out. Suspecting faulty Electronic sequencing and timing card. Your opinion and advice are needed.

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Faulty electronic sequencing releasing the tablet when cycle is ending, after drain, it is rather unusual. I do not think that is the problem.
Possible causes:
1. The machine does not fill or fill very little water, and this cause the released tablet not to dissolve. 2 The detergent drawer door is stuck for mechanical reasons, and opens very late. Opening is caused by vibration after the door had been released by timer board. Timer board release drawer door lock energizing the detergent door solenoid, but door stays closed until vibrations cause opening at the end of the cycle.

The first step is ensuring the machine is filling properly. The amount of drained water will not exclude underfilling. Check water level switch and inlet valve. If filling is OK test detergent drawer and solenoid.

Posted on Oct 06, 2009

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Posted on Jan 02, 2017

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