Question about Bosch 24 in. SRS43C12 Classixx Slim-Line Free-standing Dishwasher

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Bosch classixx dishwasher not heating water on cooler wash works on hot wash

Running on hot wash

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  • 56 Answers

Most dishwashers don't heat the water. They run on whatever temperature water you have it set for. They have heating coils on the bottom but that's for drying, not heating up the wash water.

Posted on Nov 30, 2014

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6ya6ya
  • 2 Answers

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

BIKER T
  • 909 Answers

SOURCE: Bosch Dishwasher with very little water pressure or power

It all stems back to your incomming water supply. Either the sieve is dirt or the valve is blocked with sedementation. Some valves are servicable and some are not,if your valve has screws then its revicable. (low water pressure restricts movement on arms.)

Posted on Sep 18, 2009

  • 32 Answers

SOURCE: is the Bosch Classixx Dishwasher hot or cold fill

Cold fill only

Posted on Jan 03, 2010

  • 457 Answers

SOURCE: Bosch Classixx Dishwasher stck in one program

the module must be changed. let me know what happens. im a old bosch tech

Posted on Feb 26, 2010

  • 457 Answers

SOURCE: Bosch Logixx dishwasher gets stuck on either wash

you have a bad control module. send me a 4 thumbs post if this was helpful to you.p.s im a old bosch tech

Posted on Feb 28, 2010

Macmarkus
  • 2605 Answers

SOURCE: My Bosch dishwasher runs long.

Hello,

Welcome to FixYa.

Based on your description
I'd say the issue actually with the control...unfortunately.


**B/S/H/ also issued a recall on certain models between 1999 - 2006 depending on the model & serial number, you can check with yours, though many not included here still suffers from the same problem...you'll need the serial number too. Here`s the link if you want to see for yourself **

http://microsites.boschappliances.com/safetyrecall/dishwasher/


As I've alluded to the issue is likely within the electronic timer/control, specifically the heater relay solder joint. ( a faulty flow switch, ntc or heater can also cause this, but not very probable ).

If you feel capable of checking this on your own, there`s a way to visually inspect the control yourself...it really isn't very complicated.

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.


dabfa62.jpg


The culprit will 99% of the times be one of the pins from the heater relay,

9f1823d.jpg

**Flip this over and inspect the solder joints, it will be obvious when you see it.**

This ones new, but it's where to look...

9119d99.jpg


...hence the unit sit`s and takes longer & longer to finish because it can`t heat to advance or unless the 2 buttons for "cancel" are pressed...or takes a long time as I mentioned and eventually display's "1" on units with a display and usually very poor cleaning and obviously no "extra" heat ( aside from the water inlet temp. ) as a result.

You can also run the unit through a regular or econo cycle ...any cycle with the exception of rinse & hold, and with the door panel removed place an ammeter on the gray/black wire it should draw 11 amps during the wash cycle...after it fills and the flow switch indicates it has adequate water to engage the heater.

i.e.

f57273b.jpg
**My Opinion - if you or someone you know is proficient at soldering, a lot of times it can be remedied by simply repairing the solder...but it has to be done well...or it will not last, 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 or turn off the breaker 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/Siemens, to service your machine.

Hope this answer`s your question, let me know if I can assist you further.
Thank`s for visiting "FixYa" for your repair inquiries. Please take a moment and rate this solution to it's helpfulness.

Good luck.

Regards,

Macmarkus :)

Posted on Jan 03, 2011

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Hello,

Welcome to FixYa.

Have you insured the unit is connected to a hot water supply line ? The water will not heat until it start's to circulate and activates the "flow switch" in the Bosch dishwashers.

If it is connected to a hot water supply, try running the hot water at your sink taps before turning on the dishwasher. If you still do not have hot water, check your hot water heater or supply.

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Let me know what you find out and I'll try to assist you in any manner I can going forward.

Regards,

Macmarkus :)

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