Question about Bosch 24 in. SHX46A05UC Built-In Dishwasher

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Bosch shx46ao5uc takes 3 hours to cycle. Whats the problem

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Hello and welcome to Fixya.

If it is taking 3 hours to complete a cycle as you stated, I would counter that with a question. Is the water entering the machine hot or relatively cold ?

If it is cold, this will be a major factor in the unit taking a very long time to complete a cycle. Each time the unit has to fill the heater must then heat it until satisfied ( usually 85degrees celcius) , this can take 5 minutes or 15 minutes each time depending of course on the inlet temperature, hence extending the cycle by potentially an hour or more ( a normal time is typically 90min to 2 hrs. )

You can try running the hot water at your sink tap to insure the cold water is out of the lines just before you turn on the dishwasher. If it is what I suspect, the control, this won't make any difference but it's worth a try.

If on the other hand the water is good and hot entering the machine, you likely have an issue with the control. repairclinic.com carries them as part # 1102296 at a retail price of $185.65US. as I type this today May12,2010

however, I have a suggestion as to identifying the culprit, thus confirming or dismissing the cause...

since the issue with your Bosch dishwasher potentially lye`s within`the electronic timer/control as I alluded to, specifically the heater relay solder joint. You'll need to access the control for a visual inspection ( a faulty flow switch, ntc or heater can also cause this, but not very probable ). This is possibly one of the reasons why it runs for 3hrs unless pressing the two buttons for "cancel".

To inspect and possibly repair your unit It will require you to remove the control from the unit and then remove the control from it`s plastic housing and look for a burnt solder contact on the printed circuit board. This will be one of the pins from the heater relay, hence the unit runs & runs ( because it can`t heat to advance or until canceled ) trying to heat the water.

**Further to this, if you or someone you know is proficient at soldering, a lot of times it can be remedied by simply repairing the solder...although Bosch recommend`s replacing the control and I don`t pretend to speak on there behalf nor do I profess to know better. This is just my experience (it work`s) and my opinion (why buy new if one can repair ?)**

**Please disconnect the power before attempting any service to the dishwasher. If you do not feel comfortable attempting this service, call a local pro, preferably one familiar with Bosch/Thermador/Gaggenau, to service your machine.**

Hope this answer`s your question's, let me know if I can assist you further. I will look for your reply in regards to the water temp question I had.

Thank`s for visiting "fixya" for your repair inquiries. Please take a moment and rate this solution to it's helpfulness to you and leave a testimony if you're satisfied.

Good luck.

macmarkus :)

Posted on May 13, 2010

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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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Posted on Jan 02, 2017

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