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Tacitus2

Member Since 08 Jul 2013
Offline Last Active Jul 25 2014 07:44 AM

Posts I've Made

In Topic: Bosch Ecosense dishwasher SHE6AF06UC error E24 and E21

24 July 2014 - 04:48 PM

Update: Replaced the heater/circulation motor unit and the dishwasher works fine. My suspicion is the impellor unit was draggy for some ereason, perhaps it had come off of the interior inaccessible bearings, and the dishwasher registered this as a blockage. The parts site associated with this website was a good deal all around.  Circulation pump Part number: 00669135

Part number: 00669135


In Topic: Bosch Ecosense dishwasher SHE6AF06UC error E24 and E21

19 July 2014 - 03:37 PM

Update and more help needed please:

 

I repaired the broken handle when I found a reasonable deal on the part. With gentle treatment it seems to be fine.

 

E24 no longer shows up.

 

E21 intermittently showed up. Seems to show up around 2-3 min in or 6-7 min in depending on the instance. Turning it off and on at 1 min into the cycle reduced the likelihood of this happening. Now it is at the point where it always gives this error and is unusable.

 

I have run the self-diagnostic, it gives no errors.

 

I have checked the lines and pump and they all seem to be clear of obstructions. Have checked and the pump itself seems clear of obstruction.

 

Ohmed out the circulation pump and all branches read about 16 Ohms. This seems a bit high, but it is an analog multimeter and may be a bit inaccurate. Them all reading identically suggests it is OK.

 

Removed the motor/impellor from the housing and determined that the impellor can rotate, but it seems to have a lot of friction and be slightly off-center due to the magnet on the motor. Not sure if this is normal or not.

 

I had tried replacing the lower control board mentioned by centralappliance1 back when dealing with the E24 error a year ago to no effect, so unlikely it is that now.

 

Anyone have an idea of what else to check out or is just time to start trying to replace parts? If so, I am looking at replacing the pump first (which of course is a single unit with the heater, not purchasable separtely and over 25% of the cost of the whole machine), and if that fails then the lower control board.


In Topic: Bosch Ecosense dishwasher SHE6AF06UC error E24 and E21

21 July 2013 - 07:49 PM

 E:24 No drain flow possible
 Drain pump is running but unable to remove the water, drain system blockage.
 Check for blockage of drain hose, pump, backflow valve

 E:21 Blockage
 Heat pump unable to circulate and clear blockage.
 Replace heat pump

OK, so based on the information you guys gave me I took the system apart and examined all hoses. They were all clear. I took off the drainage pump and that was clear. I took off and took apart the circulation pump as much as possible and found a thin piece of plastic wedged in there. Boom. Put everything back together, but still got the same errors.

 

Drain Pump 90 Ω between each of the (3) Windings

Heat Pump 13 Ω between each of the (2) Wires

Cecked all the resistances and the pumps seem good.

 

Clearing error codes

To clear error codes, run the customer service test program.

Error code E:24 for drain obstructions

If a dishwasher doesn’t drain properly and / or shows an E:24 error code ( ), the problem usually is not with the control
or drain pump. To solve the issue, (1) the control must be reset and (2) the obstructions generating the error code must be cleaned out.

To reset the control

1. With the door closed and the dishwasher turned on, press and hold the Start button for ~ five (5) seconds -- the display should show "01" or "00". Press the On/off button (turning the dishwasher off) and the control should be
reset.
2. If step one (above) didn’t work, remove the toe kick and disconnect the drain pump harness from the drain pump.
Make sure the connector isn’t touching anything – tape the connector if necessary. With the door closed, press the
On/off button to turn the dishwasher on. You should hear the control turn on and control relays click on and off. Wait
about 30 seconds with the power on, then press the On/off button to turn the dishwasher off. With the power off,
reconnect the drain pump harness and reinstall the toe kick. With the door closed, press the On/off button to turn
the dishwasher on. The control should be reset.

Clearing obstructions

With the dishwasher installed and drain hose connected, open the door to the dishwasher and remove the sump filter. Add water to the sump until it is filled. Then gently lift up on the safety float until the float switch closes (~ 1⁄4”). The drain pump should turn on and drain the water out.



1. If the drain pump turns on, but does not drain, check the internal and external drain hoses for kinks or obstructions. Make sure the drain pump cover is properly snapped in place. If the drain hose is attached to a garbage disposal, make sure the disposal plug is removed and the disposal doesn’t have any obstructions.
2. If the water drains out completely, release the safety float If water flows back into the sump, the backflow
(check) valve may be stuck open. Clean out the backflow valve and sump. If necessary, replace the backflow valve.

3. If the drain pump doesn’t turn on, remove the drain pump cover, check for obstructions and make sure the pump Impeller turns freely.
4. Carefully remove the suction cap from the sump and make sure the heat pump impeller turns freely (using a 5 mm nut driver).
TIP: Opening and closing the door bypasses the E:24 error code, allowing the dishwasher to continue in the wash cycle (unless it is reset).



The heater, temperature sensor and othe components are part of the recirculating motor assembly.

So I did the reset and am no longer getting the E21. I have continued to monitor the dishwasher and it has not come back. I still continue to get E24 though. I tried your process for clearing obstructions and the system drained well with no backflow. No idea why E24 still comes up as the performance of the dishwasher does not seem in any way impaired. The tip you provide is exactly what I discovered by accident, though I did it by turning the machine off and on again just before the code would have come on.

 

So, thanks to your help the dishwasher is working, but it still is giving me an error message I see no reason for. This is something I could live with if I cannot find a way to take care of it, but it is bothersome.


In Topic: Bosch Ecosense dishwasher SHE6AF06UC error E24 and E21

12 July 2013 - 11:49 AM

Bosch Ascenta Service Manual:  http://appliantology...ruction-manual/

Great. Unfortunately I have reached the limit of downloads I can do in a week from looking through other manuals (wasn't aware Ascenta was the model name as it doesn't appear on the dishwasher or manual anywhere). I will take a look at it as soon as I can. Does it have a list of expected resistances in the pumps so I can check if those are the problem?

 

Thanks


In Topic: Bosch Ecosense dishwasher SHE6AF06UC error E24 and E21

12 July 2013 - 11:46 AM

 E:24 No drain flow possible
 Drain pump is running but unable to remove the water, drain system blockage.
 Check for blockage of drain hose, pump, backflow valve

 E:21 Blockage
 Heat pump unable to circulate and clear blockage.
 Replace heat pump

Thank you very much. E 24 is odd since the first thing the dishwasher does is drain excess water and it seems to do it like a champ. No detectable blockage and the water flows well. Do you know if there is a sensor the dishwasher uses to detect drainage? That might be a place to look. I will also examine all interal tubing for any sort of blockage and  make sure there is nothing stuck in the pumps.



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