Hello, Welcome to FixYa. On Bosch dishwashers with display such as yours the 2H indicates the cycle wash time is exceeding two hours and it should not. This is typical of a heating error so the cause must be determined. The question must be asked, is it a heater, a flow switch, an NTC or the actual control ? I can also tell you most times it is the control. I am presently on my iphone and as such don't have access to my files but if you check out my profile under dishwashers you will find a detailed explaination of how the check. Look specifically for units that show "1" and run & run. You will also find a link to the Bosch website on info regarding a recall which relates directly to your model and said issue. Otherwise I will post more info for you in the AM . Regards, Macmarkus :)
**B/S/H/ also issued a recall on certain models between 1999 - 2006 depending on the model & serial number, you can check with yours but...you'll need the serial number too. Here`s the link if you want to see for yourself **
http://microsites.boschappliances.com/sa...
he 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. 
The culprit will 99% of the times be one of the pins from the heater relay,
**Flip this over and inspect the solder joints, it will be obvious when you see it.**
...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 or 2H and usually very poor cleaning 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.
**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.
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 :)
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Remove the panel on the side where the drain hose exits the machine. This involves 2 hex headed screws in the front trim and 2 pressure points in the rear. look in under the machine for any standing water. Make sure the entire area is dry, especially near the little rod that moves up and down. This is attached to an overflow valve. Standing water will cause the float valve to engage and produce the problems you describe, Once dry turn on the machine to see if this solved the issue. You may need to clear any in progress cycle. This often clears up this issue. If it doesn't then you can go looking for faulty valves and control board issues and heater problems which can also create the situation described. But I always go for the low hanging fruit first.
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