Bosch dishwasher woes - chasing repair manual

[sudsmaster]

Huh.

 

I don't know if this is at all relevant, but I had to replace the drain pump on my 110 volt Bosch SHU43CU about five years ago. It's been running just fine ever since. Never did figure out what was wrong with tho old pump. Granted, it's not a wash pump, but might be an indication that Bosch pumps sometimes fail prematurely.

 

Over and out.

 

[chachp]

Pump failure in about a year or so.

 

<span style="font-family: helvetica;">We have a Bosch 800 series.  When it was about a year or so old it was getting a 09 error which meant the water was not heating to the desired temperature.  They replaced the heater/pump and it's been fine since.  It's almost four years old now.</span>

 

<span style="font-family: helvetica;">I watched what he had to do to replace it and it looked like a real pain.  He pulled out the dishwasher and it looked like he had to disassemble half of the dishwasher from the right hand side I think.</span>

 

<span style="font-family: helvetica;">The posts I read suggested that a higher sudsing detergent (I was using Cascade) could be the reason for the failure but reading some of these posts would seem to me it's a part that has a high rate of failure.</span>

 

[ivanovitch_k]

Had the same issue on a 10 yr old bosch dw. This was reported as e24 or 25 error iirc. During the sump pump self test, opening + closing the door bypasses the test result and allows the cycle to continue as normal. I operated mine like that for a few years until I was fed up because of the impossibility to use delayed start + having to constantly explain others that in order to use the dw they need to open to door at the right time based on motor noises xD !

 

[henene4]

Replacing the wash pump

Actually relatively easy on these machines compared to older Bosch's.

Side off, disconnect electronics, swing it out of the way.
Unplugg pump, twist pump of.
Remove hose clamp, put it on new pump.
Place pump back in and secure hose clamp.

The space is pretty tight and it can be quite finicky.
But compared to the old design you don't have to pull the bottom off the machine.
Lots of videos on YouTube show the removal of dozens of panels, the only one that shows the very shortest way to do this repair is this German one:



If the pump gives errors occuring during the early stages of the cycle (at the very beginning during the calibration) it is physically worn as in the bearings or seals are bad in some way.
The calibration gives of limit values due to high internal friction, thus the errors.

Those seem somewhat more likely after a couple years of use.
The heating issues often happen very early on.

Another common issue is/was the heating for the additional drying system (Zeolite).
The "old" design had a glass cased heater that could get moisture inside.
Just with many issues on these that has been worked out with the newer generation.

Actually quite impressive that Miele had 2 more major overhauls since the mid 2000s, meanwhile BSH have been using that design for 15 years or so now and are still in the top scores efficiency and performance wise.

 

[jben]

When did they change to the different heater style ?

That same pump/heater failed on my SHE4AM16UC that was made in 2008. I remember it was a very expensive part (~$200 U.S.) but wasn't too bad to replace once the machine was pulled out of the cabinet.

I thought the newer Bosch units no longer used that design (as in the video above) because I worked on a SHE55M12UC that was made in 2011 and it used the different heater design like I have pictured. It was a pain to replace but didn't cost as much.

Is one considered better than the other ? And does anyone know which year they changed or did different models use the different heaters depending on model ?

 

[henene4]

There is no fixed year they switched over, both were in use at the same time for a few years.

Every machine featuring their EcoSilenceDrive has the integrated heater to the pump.

The first year I know the EcoSilenceDrive was mentioned was with the first Zeolite Models over here and that was 2007 IIRC.

The thing about the old pump design was that the pump was to big to fit through the small gap on the side in my experience.

Replacing the heater might have been possible in situe, but the pump didn't fit IIRC.
So you had to split the tub from the bottom.

Pumps were much more expensive back then mainly because they used way more copper compared to the new pumps.

The final switch over to the EcoSilenceDrive happened only a few years ago with the BOL machines with plastic tub bottoms going to it aswell.

 

[gelaundry4ever]

My experience with a Kenmore

I can tell you with my experience with my current Kenmore, it behaves just like a Bosch.

 

[gelaundry4ever]

wash pump styles

What styles of wash pumps did Bosch use over the years in the states?