Question about Bosch 24 in. SHU5305UC Built-in Dishwasher

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Error code 2H.....or stops on last minute

I get the error code 2H when I start the dishwasher, or it runs and stops on the last minute and keeps on running. I can "cancel" and it drains.....anyway to fix it? I have two of these units in my kitchen and the other one did the same thing! Replaced the control board twice!! ...then a third sevice main said it was the drain switch.....arrgghhh!

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Re: Error code 2H.....or stops on last minute

I don't think you'll find it's the control board.
I think you'll find it's the heater box.
Not an easy job to do yourself unless of course you know what you are doing.
I would suggest you contact Bosch. One other possiblity is that the water inlet is blocked, although to be honest this is very rare.
Deep Diver

Posted on Jan 18, 2008

Re: Error code 2H.....or stops on last minute

Heater is working fine, dishwasher draws 11 amps and heats water to 140F on Regular wash cycle. Could it be the "Sensotronic" sensor or some other sensor?

I went ahead and replaced the control baord. It ran fine for a couple of cycles, then the problem returned. However, now it runs OK on the Economy and Regular cysles, but the Scrub Wash shows 2H at the start of the cycle. I understand it takes a couple of cycles for the controller to reset itself, so maybe the problem has been solved-- will post an update in a week or so.

Posted on Jan 18, 2008

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Hello Lou,
I see that your Frigidaire dishwasher will not start. I would recommend giving the appliance a hard reset. You will do this by switching the circuit breaker off that the dishwasher is attached to. When you do this you will want to leave it off for 20-30 minutes. Once the 20-30 minutes has elapsed, bring power back to the dishwasher and try to restart it. If you are still receiving a 125 error code and the dishwasher is not starting, I would suggest contacting your local authorized technician to diagnose and see why you keep receiving this error code.

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My gaggenau dishwasher GM 954-110 is not working. when i switch it on the display panel shows 2H.

Hello, welcome to FixYa.

The dishwasher you're speaking of (provided it is indeed a Gaggenau GM954) is built by Bosch as you may or may not know.

To address your concern regarding the 2H in the display actually needs to be done in two parts. I'll start with the basic info associated with the 2H displayed.

This can be simply indicating the previous cycle exceeded a 2 hour wash cycle, not necessarily an error and can be attributed with too cold water entering the dishwasher (below the recommended 120F), a longer than normal drain time (due to partial blockages, kink etc. hence longer time needed to complete the cycle) or inproper water circulation during the cycle.

Aside from these issues, it (2H) can also mean the unit has a heating error and if left long enough will show another error of "1" in the display, extremely long wash times, etc.

**The first thing I'd suggest before attempting any repair is running an additional cycle while making sure the water inlet is hot (120F optimum) and the unit does indeed drain fine.

**A fair indication of proper draining is to start a cycle and once washing begins (2-3 minutes) activate the "cancel" and the unit should adequately drain in the 2 minute time allowance.

**To identify proper water circulation, place an empty cup in the upright position in the top rack, start a cycle and inspect the cup after 2-3 minutes and it should be full of water.

After trying and posting the results of these thing's we can move forward with potential heating errors, the cause, and how to remedy them. Let me know what you find and I'll continue to assist you in any manner possible going forward. Good luck.


Macmarkus :)

Jun 30, 2011 | Dishwashers

2 Answers

What is error code 2H

My Bosch dishwasher did the same thing. When the wash cycle starts, the dishwasher fills with water and then the heater is supposed to turn on to heat the water. If the water does not heat, then it will display 2H continuously. The heating element may be bad, but a more likely cause is with the control module. Bosch has a problem with the control module printed circuit (pc) board that powers the heater on many models. The solution requires some technical expertise and soldering skills. The details are explained in the document "Bosch dishwasher troubleshooting tips" on page 11. Download here
Bosch recommends re-soldering the connection, which is a temporary fix. The problem is that the copper conductor (called a trace) on the circuit board is not wide enough to handle the current required for the heating element, and as a result the copper trace overheats, causing the solder to melt on the relay connection. The best solution is to remove the control module PC board and solder a short length of copper wire between the pins to prevent the overheating problem, as shown in the attached photo (magnified portion of PC board). I did this on my dishwasher and it has been trouble-free for over 3 years.


Jul 07, 2009 | Bosch 24 in. SHU5305UC Built-in Dishwasher

2 Answers

Touchpad--No Response

The "2H" is an error code indicating the control panel needs to be replaced.

May 08, 2009 | Bosch 24 in. SHU53 Built-in Dishwasher

1 Answer

2H accures in digital read out. NO Cycles start, just a humming

Do you own an LG LDF6810ST dishwasher? If not, please reply with the manufacturer name, model and serial number.
Are you saying that the display that normally shows the time is displaying an code of 2H? On an LG, that means 2 Hours, (120 minutes) and is not an error code.
On an LG with a symptom like this, I would arrage to replace the main processor card (PCB). You would be getting an error message if the motor (wash or drain) had failed.

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I would check the buttons on the control they may stuck. check the delay button..

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1 Answer

Error code 2H

The control panel needs to be replaced (indicated by the "2H" error code displayed at the start of the cycle).
BTW - The number 1 displayed at the end of the cycle indicates the cycle has timed out (i.e., it doesn't mean 1 minute remaining). Hence the continued running of the unit. Until you replace the control panel, you'll have to manually cancel the cycle at this point.

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Problem with Bosch built-in Dishwasher Model SHU6806UC

I had the same problem and just today replaced the control board module. Purchased the control module online and installed in myself. Was not that difficult. undo the screws (torx screw driver needed) unhook the connections to the board and label all. Pull the board out and open, found burned connectors. Now works like a dream.

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