Bosch SPV50E00EU Dishwasher: Water Not Heating & No Drying - Possible Heater or Relay Issue

Hello. I have a problem with the Bosch SPV50e00eu dishwasher, namely the water does not heat up during washing, I checked tangibly by opening the dishwasher during operation and thus it also does not dry after washing. No matter which program 45 ° C or 50 ° C (ECO), and these I use the most, it is the same all the time. The problem appeared recently, for about two washing cycles I have noticed that there is no heating.
- I cleaned all the filters inside,
- I also cleaned the drain pump impeller,
- the dishwasher is washed with a cleaning agent from time to time,
As it usually happens in such cases, the first thing I searched the forums is, people most often say that it can be a relay from a flow heater (probably there is one here?), Or the heater itself?
Will you help?
Greetings

systems wrote:

or the heater itself?

You remove the plug from the heater and measure its resistance with a meter.

OK, I can handle this measurement somehow (I have to get a meter) but the problem is that I do not know where the heater is, if I only had a diagram with an exploded view, where which element is located would be easier, and so it is a bit after in the dark ...

So at the beginning I took a photo of the right side (photo 2) (looking from the front) of the dishwasher, on the left side there is a whole water jacket (photo 1), it seems that it is ok, it is not very dirty, at first glance the elements are unobstructed.

The box with the relays and the pump are probably OK (in the sense of nomenclature), the rest are still hidden. Today I tried to get deeper ... First I tried to take out this white box, but somehow reluctantly, as if there are two latches (visible in the photo) ... One and the other released, but something is still holding, and I do not want to break off. I will see tomorrow, or maybe someone has a diagram?
Greetings

Hello,
I had a similar problem with the dishwasher (SMV40M30EU / 50). The heater in the pump has been damaged. Nowhere can I find instructions on how to disassemble this dishwasher step by step, so I will try to describe how to do it.

General, probably obvious caution not to force anything, as most of the parts are made of plastic, so be careful not to damage something. After removing the dishwasher, you need to remove the covers and, of course, disconnect the device from the power supply
.
First, unscrew the elements marked in the picture (srodek.jpg).

Then you need to detach the side hook of the water tank from the dishwasher's body (basen_wody.jpg). You do not need to disconnect the tank itself from the pipes to get to the parts hidden under the body, just disconnect the element from the dishwasher compartment. (I also do not recommend detaching the tank because you can spoil the smell in the house / apartment - the tank is connected with a hose to the drain in the sink, also the water in the drain hose stinks, so if there is no such need, I would recommend not to disassemble the tank).

In order to get to the elements hidden under the dishwasher compartment, you need to remove the dishwasher compartment from the plastic stand. For this purpose, the plastic handles holding the door should be locked on the plastic stand (Widok_ogolny.jpg). To do this, open the door and then, when closing it, pull the plastic handles on the base. The photo seems to explain the description.

Now you can start removing the chamber from the base. This should be done by pressing the plastic latches on the front of the dishwasher from the inside and bending the metal fasteners on the back (hook_front.jpg; hook_tyl.jpg).
Be careful of the cables that connect the dishwasher door to the rest of the components. They are quite short, so the dismantled body must be placed on the front, close to the base.

Now everything is available and you can start dismantling the pump. Remove the clamp securing the pump with the plastic "plate &" and pull the pump off.

The pump itself is disassembled by pressing four latches and sliding the element. There is a heater inside, which in my case was damaged. More precisely, the solder marked in the photo (pogalka.jpg) was burned out. After burning, traces of soot on the body were also visible. . From what I was able to find out, most of the heaters fall in the same place. After soldering this place, the heater was repaired. However, I decided to buy a new pump because I had doubts about the quality of my solders.
I have secured the new heater with varnish so that there is no air access to the solders, maybe they will not oxidize so quickly. I am not an expert in this, so time will tell.

If someone undertakes to replace the heater itself and disassemble the pump, I recommend assembling the pump in this order:
- press the heater into the front body of the pump (the one with water inlets and outlets) (taking care not to damage the seals. The first time I got the seal rolled up)
- then remove the gasket from the second part of the pump and put the gasket only on the heater (pomp_tyl.jpg)
- put the second part of the pump on the heater.

Assembling in a different order for me ended with pinching and folding the gasket in the first part of the body. Obviously, the pump was leaking as a result. Assembling in the way I described took probably a minute and did not require any additional lubricants to help press the heater into the seals.
I added a photo of the cable layout. Maybe it will be useful to someone.

Complete pump combined with heater to be replaced without combination.

jkosiel wrote:

There is a heater inside, which in my case was damaged. More precisely, the solder marked in the photo (pogalka.jpg) has burned out. After the burnout, traces of soot on the body were also visible. . From what I was able to find out, most of the heaters fall in the same place. After soldering this place, the heater was repaired. However, I decided to buy a new pump because I had doubts about the quality of my solders ...

.

Hello, I have a question, how did you assess that after soldering the old heater was repaired ??, did you measure the resistance ?? or something else...??

Today I disassembled the dishwasher according to your instructions, but after soldering the same path as yours (maybe I soldered badly, but it seems to me that I branded it well), unfortunately the dishwasher does not heat up ..... I was not too surprised because I measured it before assembling with a multimeter, the heater's resistance where the plug enters and nothing twitched on the display, I put the 1st probe where the path on the heater begins, i.e. to the pin in the plug and after the heater runs around, it ends at the second pin several times, because the third is from the ground. ..and nothing: /, a day of work in vain: /.
In addition, I checked the board where the relays are placed, there are no cold solders for my eye, maybe something else with the heater relay wrong but ... I doubt, I think it's the heater's fault ... because zero resistance in the indicated places, maybe completely the heater is broken ... and soldering will not help, unless I'm doing something wrong ..., advise something.

Below is a photo of the heater:

Hello,
After soldering, I just checked the resistance on the contacts you marked in the photo. For me, the current began to flow after soldering in a sense the meter showed resistance. If the meter still does not show anything, it means that you need to continue trying to resuscitate the heater.
I am not an expert in soldering, unfortunately, it is difficult for me to advise something on this topic, I will only add on my part (as the heater somehow managed to solder) that I put a new solder along the entire length of the exposed path (from the place where the blue coating ends to the leg) . It seems to me that you can also try to reveal this path by peeling off the blue coating, but I didn't do that at home. Perhaps the coating melts under the influence of the temperature of the soldering iron, but as I mentioned before, I am not an expert and you probably need to check it or maybe someone else has the appropriate knowledge about it .

OK, thanks for the hint ... probably the solder is wrong: /, so you can only put some effort into it .... it warmed I won't fight anything again. Thanks again.

Gentlemen, Mr. Jkosiel should receive a standing ovation for a detailed description of the disassembly and reassembly, together with the reason for the lack of water heating, plus for a helpful post

Friend, respect for the instructions to dismantle the dishwasher. It was thanks to your tips that all the plastics survived. Greetings.

jkosiel wrote:

Today I disassembled the dishwasher according to your instructions, but after soldering the same path as yours (maybe I soldered badly, but it seems to me that I branded it well), unfortunately the dishwasher does not heat up ..... I was not too surprised because I measured it before assembling with a multimeter, the heater's resistance where the plug enters and nothing twitched on the display, I put the 1st probe where the path on the heater begins, i.e. to the pin in the plug and after the heater runs around, it ends at the second pin several times, because the third is from the ground. ..and nothing: /, a day of work in vain: /.
In addition, I checked the board where the relays are placed, there are no cold solders for my eye, maybe something else with the heater relay wrong but ... I doubt, I think it's the heater's fault ... because zero resistance in the indicated places, maybe completely the heater is broken ... and soldering will not help, unless I'm doing something wrong ..., advise something.

Below is a photo of the heater:

Can you connect the heater to the socket outside?
So probe 1 to zero, probe 2 for 230V?
I would like to check if it heats up. The meter shows that the circuit is closed.
Nothing was soldered. Dishwasher with error 09.

Photo from a colleague from the post above.


EDIT:

I replaced the heater with a pump for new ones.
365 PLN, has been operating for over a week.
The contacts were good, only what was visible was burnt on the one side of the heater with the plastic housing ..

Hello.

In my SPV50E00EU there was a similar problem - the dishwasher did not heat the water. The reason turned out to be the same - a blown contact at the heater. Unlike my colleagues, my contact on the opposite side of the black ankle was horny, so the path under the ankle needed to be corrected. I opened the cube, got rid of the green laminate from the paths and soldered the pin with the exposed path.

However, I am writing this post for a different reason. I was able to match the heater / pump without disassembling the body. I did all the work from the bottom - it is possible in this model. We disassemble the box with the programmer, remove the clamp on the vertical pump stub and the pump is ready for departure. The original buckle is unlikely to be put back on while folding. I suggest you get a simple metal band and insert it in place of the original one during assembly. The size of 25-40mm is approx.

Of course, the operation would have failed without the detailed description of my colleague jkosiel for which I thank you very much. Amazing job well done!

Hi

In my case, the dishwasher stopped heating, I removed the heater according to the instructions, unfortunately attempts to solder the path with the pin were fruitless.
Maybe someone devised some way to remove the protective layer without damaging the path and position of the solder

greetings

I can repair such a heater. If you want it on a private message, please.