SHU9925UC12 Bosch Dishwasher periodically leaking

[zebra]

I have a 6yr old Bosch dishwasher that has recently started to leak periodically.  In between leaks (approximately 8 cycles) it works great.  The leak originates from the bottom catch pan (white with three square openings in it).  At start-up, in the first 30 seconds the pump engages, then the wash cycle starts and ends without incident, the final rinse cycle is when the leak appears to begin.  I have been unable to find a good repair manual for dummies that provides diagrams to help trouble shoot the problem.

Any suggestions would be greatly appreciated.


Model SHU9925UC12

[JWWebster]

2 screws hold the toe panel on. remove it and you will see the water valve to the left. 2 screws hold it onto the frame. remove the screws and get the water vale out and look at the connections. The discharge hose from sump to drain is to the right of the water valve in front of the pump. Perhaps you would want to observe the actions with a flashlight whilst the dw is going.

[Repair-man]

Here's what Bosch has to say about leaks:

Water seldom leaks out of bottom of dishwasher doors. Usually it’s a customer or installation issue. Occasionally temporary blockages of condensation tubes by air pockets (from standing water in loops) or kinks in tubes causes leaking. Pressure builds in tanks, blowing water past lower door seals (usually at start of cycles). Draining condensation tubes and straightening out kinks solves these occasional problems.
Service Tips -- Water Leaking Past Doors
Checklist if water leaks past doors:
Make sure condensation tubes are inserted into bases, not connected to drains or air gaps.
Clear and drain condensation tubes, including debris in bases.
Re-drill wood doors to make them square.
Straighten kinks in condensation tubes.
Educate customer on oversudsing(from too much detergent/rinse-aid or overly soft water)
Level dishwasher beforeattaching undercounterbrackets.
Replace damaged door seals, including replacements cut too short.
Refill lower racks overfilled with dishes.
Move flexible cutting boards to left side of dishwasher

I will provide you a copy of the Bosch Dishwasher Service Guide for your perusal...hopefully it will lead you to a conclusion. The advice given by JW is also worth heeding, as a visual inspection of the lower area during the wash cycle with the access panel removed may lead you to where the leak originates.

Bosch Dishwasher Service Manual

[JWWebster]

excellent