Question about Bosch 24 in. SHU43 Built-in Dishwasher

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Completed solder proceedue about 2 months ago. worked ok till now. Now same symptom has occured. no heated water, long wash cycle. Maybe the board or attached relay are done?

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  • John Gullo Jan 06, 2011

    Great thanks, did you replace the relay as part of a new board or did you replace the relay on the original board. My d/w is 8 years old but the circuit board assy. is only about 3.5 years old as I have replaced once already. Really a weak point for Bosch. Any ideas on where I can purchase a greater amp relay. If I decide to repalce the c/b do they come with the higher relay?


  • John Gullo Jan 09, 2011

    Great, thanks. I'll give it a try before I spend another 200.00 for a control assy.




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Welcome to FixYa.

Based on your post, the solder may not have been sufficient to hold, or as you alluded to, the relay itself has failed now.

The best thing to do at this point may be to remove the control, clean up the point of soldering really well and retry thr repair to see what results.

If this is indeed the SHU43 series dishwasher, there are two different diagnostics possible, one of them is presented at this link from my profile...`d have to provide the complete model number to identify which one applies to your machine.

The other opton I`ll leave with you is the possibility I can email a guide which includes the tests and other service tips.

Contact me at if interested and provide your FixYa username so I can identify who you are.

I`ll watch for your reply, good luck.


Macmarkus :)

Posted on Oct 10, 2010

  • txxttxxt Jan 05, 2011

    I had the same problem - solder procedure worked for few months and stopped... After checking/testing it, I decided to replace relay and so far so good. Looks like the root of the problem is that relay in use is rated at 10A while heating unit uses around 11A. Even though 10% of deviation is usually ok, some number of relays will burn out. If you looking to replace relay go with the one that has higher rating, I used 12A one.



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I had the same problem - solder procedure worked for few months and stopped... After checking/testing it, I decided to replace relay and so far so good. Looks like the root of the problem is that relay in use is rated at 10A while heating unit uses around 11A. Even though 10% of deviation is usually ok, some number of relays will burn out. If you looking to replace relay go with the one that has higher rating, I used 12A one.

Cheers, TxxT

Posted on Jan 06, 2011

  • txxttxxt Jan 07, 2011

    I replaced relay on the original board. For SHU43C02UC/22 the original relay was 899-1c-f-c 6VDC. I replaced it with Tyco T7CS5D-06. NTE's R46-5D12-6 should work too. Tyco's relay is taller than original and I had to cut a hole in a plastic cover for it.
    I bought relay at Digi-Key ( For under $5 delivered worth trying :-)




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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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