Have a Bosch dishwasher, about 10 years old works ...

Two different ideas from Bosch, either control board or heater element, temperature thermistor. As it fails at the rinse stage where the water is hotter, I would check the latter, or just call for service and get it correctly diagnosed and fixed. If you want to try some things, check connections to the main control board and to the heating components.

https://www.google.com/search?q=Bosch+Dishwasher+E01+Code

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7 years is close to its lifespan more to the point bosch parts are very expensive in general it all really depends on whats wrong with it?

Are the instructions on how to run the diagnostic test listed in the manual? FYI, I couldn't run the test on my Bosch DW because it was just too broken. Over the years the dishwasher essentially fried its own circuit board with excessive heat, which I learned is a problem common to Bosch DW's. Bosch told me the lifespan of my model was 10 years; mine was 11 years old (but was repaired once or twice). I replaced it with a Miele; no problems yet after 4 1/2 months.

Give this video a try. There are lots of places where gunk can build up and this video shows you how to do it on a Bosch dishwasher.

i got the perfect answer. go to thermador.com they can order this for you. bosch, thermador and gaggenau is the same company. if this helps you post a 4 thumbs up post

def replace .....time to put the old girl down ....whirlpool is a good choice ....or another bosh

The control board on these units is prone to a cold solder joint cracking. I have read that Bosch recommends replacement and will supply the board, not covering labor. I repaired mine prior and have done one for a friend as well. Has lasted several years and counting
The symptom is constant cycling without ticking down the last few minutes

Bosh dishwashers work off a gravity pump system. They sometimes require a stronger pump. Make sure if it has a air gap either at the top of the sink or johnston T or in the wall that, that is not plugged. They are very sensitive to how the drainelines are set as well. If it was installed prfessionally, call the installer back out as they should warranty there install for 1 year. Also all products have a 1 year MF warranty as well. You should be able to get a BOSH tech out at NO charge to see if it is a deffective pump.

your filters need to be replaced. it's a 10 minutes work

is your dishwasher less than a year old? if so you need to call bosch and have all the gaskets replaced. they tried a new chemical to make the gasket but now have found that after the dry cycle the gaskets put off a strange odor like your discribing. ive changed several gaskets because of this