Have Bosch dishwashermodel SHE55PO5UC. Keeps running at end of cycle. Heater works. Run cycle runs down but dry doesn't kick in. Diagnostic code shows C1PO. Can you tell me what problem is.

10 Tips to Help the Dishwasher Run Better - Cleaning Tips ...

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Apartment Therapy's The KitchnFeb 24, 2014 - Well, we're here to help, with 10 tips for making your dishwasher run its best. ... loading up to help reduce particles stuck on dishes once the cycle is over. ...water to flash dry and not roll off your dishes, taking the ends of the dirty bits with it..... but can lead to damage, particularly of any glasses you put in the ...

[PDF]Dishwashers - Frequently Asked Questions ... - Bosch

www.bosch-home.com/Files/Bosch/In/in/Document/Bosch.pdf

this cycle the dishwasher dries the dishes. 3. ... dishes. During this time, you do notneed to be around the dishwasher as it ... Does it also dry the dishes after the wash?... You can put utensils that are made out of steel, ceramic, glass, plastic which is ...No, the dishwasher runs the whole washing programme automatically.

Why is My Dishwasher Not Drying the Dishes? ' Dr ...

Long running time on a Bosch dishwasher is almost always a blown solder joint at the heater relay on the control board. You can resolder the joint, replace the relay or replace the control. Control board part number is 00266746.

If you cannot cancel the cycle then turn power off and back on.
Then try to program a short cycle from panel and see if it works.

I am assuming when you say that it keeps running you mean the water keeps churning and does not drain out.
If short cycle works ok then the dishwasher is not heating water to the correct temperature. Need to check thermostat or heater.

Could be a heater or pcb failure, if you are hearing the bang/knock during fill up it could be the water is not reaching level and then the heater will not come on (boil dry sensing) try the following. Turn mains off first.
The pressure chamber or hose (pressure chamber to sump) may be blocked and the microswitch is being activated because the water is not entering the tank quick enough. Isolate from electric, remove lid and left panel (looking from the front). There is a plastic chamber bottom right of left side with two microswitches, either this is blocked or the hose that runs from it to the right and along the back of the kick panel and into the sump. Clear either or both (make sure all hoses are pushed true when repositioning).

This is a partial solution. After reading lots of other similar descriptions (none of which were automatically identified by FixYa, btw), we realized it was probably water in the 'catch basin' or whatever that pan (white plastic) below the sump pump is. Sure enough, there was about 1/2" of water in the pan. We hoped that by overriding the float switch and watching it run through a cycle, we would be able to see where the leak came from. Unfortunately, running a rinse & hold (10 min) didn't do it, so we are about to run it on a quick wash (56 min). To do this, we have left everything connected (power & water), and removed the toe kick cover, to give us access to the works below the main compartment. A long chopstick works well to get at the red float switch actuator; we used two of them to dip a washcloth in the water to soak, and then remove the washcloth and wring it over a bowl. Slow, and tedious. But the alternative was to do the 3 hr teardown just to get the pan dried before we could run it through a complete cycle. We're still hoping this will let us see the leak.

have the board and heater changed

From the service manual there is more to it but that was all I could put here.
Accessing Service/Diagnostic Mode:
Pressing down the damp dry and time (-) keys
for 5 seconds places the machine in the
diagnostic mode.
SPECIAL TESTS
The following table lists the various tests
available while in the Service Mode, which
can be accessed by pressing the following
keys:
Press Keys Special Test/ Function
wrinkle
release Diagnostic Codes
dryer
temp(^ )
Sequences up the
help/diagnostic code list
dryer temp(v) Sequences down the
help/diagnostic code list
time (-) Displays Software Revision
Number
very dry(< ) View current cycle
temperature (Co)
start/pause
Start or pause cycle running
but remain in Diagnostic
mode
Accessing Diagnostic Codes
After the machine is in the diagnostic mode,
a ‘d’ will display and let the technician know
they are in the diagnostic mode. Pressing the
wrinkle release key will access the diagnostic
codes.The diagnostic codes can be viewed by
using the temperature (^) & (v) keys.
The down arrow key will sequence down the
list one each time it is pushed with no wrap.
The first time the down arrow key is pushed
the display will sequence to the next code
logged. The last code being displayed being
the oldest code. The up arrow will sequence
up the list one code each time it is pushed
until it reaches the top code. If there are no
diagnostic codes available, ‘00‘ will be
displayed for the diagnostic code.
There will be no multiple occurrences of
either a diagnostic code or help code generated
in the same cycle reported on the list.
But if the same code occurs in repeated
cycles, it will be registered.
To clear the diagnostic code list press
wrinkle prevent and very dry (>) for 5
seconds while viewing the list.
System Check Mode
While in diagnostic mode, pressing the damp
dry and signal (+) keys for 2 seconds, will
put the dryer into the system check mode.
"SC" will display.
This mode will allow the various inputs and
outputs to be controlled and viewed by the
technician by pressing individual keys. If no
activity is seen for 5 minutes after a key is
depressed, the control will reset back to the
normal mode. If no further activity is seen
after an additional 5 minutes the washer will
turn off. The following table lists the various
functions based upon on keys being depressed.
Membrane Pad Check
While in system check mode, pressing the
damp dry and sensor dry keys for 5 seconds,
will start a membrane pad switch test.
The membrane check involves turning all the
embedded LED on the membrane pad on.
All the LED’s can be toggled off by pressing
the key associated with the LED. To exit the
test at any point, press the damp dry (>) &
sensor dry keys again for 5 seconds or press
the off key to exit diagnostic mode.
Key Pressed: Function Performed
sensor dry
Enable sensor dry circuit.
(sense dry LED) When short
circuit is detected across the
sensor bars the normal dry
LED will turn on.
start/ pause
Cycles the motor relay
on/off. When the motor is
running the start/pause LED
is on.
dry temp(^ )
If motor is running, cycles
the heater/gas valve on/off.
When the heater is regular
temp LED is on.
very dry(< ) View current cycle
temperature (Co)
www.appliancehelponline.com

There is a recall on the control board of many of these models. I have written a guide to help. It is here. Look for the phone number near the top.

There are no adjustments for cycle timing. What does affect timing is temperature of the water coming into the DW. The hotter your supply water, the shorter the time to cycle, BUT if your water is too hot, the cycle time may become too short to light the NSF 'Sanitize' indicator. But since the cycle is taking so long, this is an indication that the DW's water heater is not heating the water hot enough to advance the countdown timer in a timely manner. The control logic is waiting for the temp to come up to an appropriate level to ensure adequate washing, rinsing or drying times. Likely your display is showing '1' for a long time as a symptom of this problem, as well.  - This link http://www.applianceaid.com/boschDW.html has procedures to run self-tests on various Bosch models. I suspect that you can confirm a 'heater fault' on your unit by running the self-test.  - This problem invariably relates to a 'heater fault' which has usually been traced to an open solder joint on the control board located behind the switches/indicator lights on front door. If you have a Torx driver, soldering iron & bit of solder, you can effect a repair yourself in about an hour. Otherwise, a replacement control board is required.
-  If you'd like to attempt replacing the control board yourself, refer to this link for part & DIY information. http://www.appliancejournal.com/appliance-parts/bosch-appliance-parts/bosch-dishwasher-control-module-266746-37/
- Else, place a service call to the tech of your choice.