Hello, welcome to
Fixya.
The
problem you're describing is unfortunately a common one with B/S/H/ built dishwasher's. That includes Bosch,
Thermador, Siemens, and
Gaggenau.
Here`s the most likely reason why it has detected the error...
Even if your home water supply appears hot, it's not hot enough and must be heated by the dishwasher to insure a proper clean and dry. Most if not all manufacturer`s do this.
When it comes to your Bosch dishwasher the problem likely
lye`s 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 ). This is why it runs forever unless pressing the two buttons for "cancel".
To 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 sit`s just running on & on because it can`t heat to advance or until
canceled.
**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 their 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**Installing a new control will certainly remedy the problem as well but since it is typically around $170 and up just for the part, I am more likely to offer someone an alternative to buying new, hence my first reaction to mention this repair tidbit.
The control is available at most brick & mortar appliance parts stores or on-line at vendors such as "repairclinic.com", "apwagner.com", "searspartsdirect.com" etc. part number is based on your specific model number so you`ll need to provide that.
Hope this answer`s your question's, let me know if I can assist you further. Thank`s for visiting "fixya" for your repair inquiries.
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Good luck.
macmarkus :)