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[Solved] Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor

lensa 6552 11
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  • #1 16769823
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    Hello,
    After reading the electrode and displaying error E9 I dismantled the dishwasher and I know that I have to buy a pump with a heater. The heater cannot be removed from the housing. There was a leak on the O-ring and a heater shot. I'm heading for something else, while cleaning the plastics, I had to unscrew the gear motor that controls the water flow.

    P I would grow for help in assembling, and actually in the exact arrangement of the cog and holes - I think it matters. I am asking for help and I attach photos. One more thing - can the gasket on the main plastic attached from below be removed or placed on silicone.
    Regards hoping for help.
    If anything please contact lensa1969(_at_)gmail.com - maybe I can help you with something.
    I always have to overdo something ...
    Grzegorz
    Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor20171021_1..939.jpg (940.61 kB)You must be logged in to download this attachment. Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor20171021_1..333.jpg (910.77 kB)You must be logged in to download this attachment. Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor20171021_1..942.jpg (686.94 kB)You must be logged in to download this attachment.
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  • #2 16770731
    falo22
    Level 25  
    Posts: 630
    Help: 89
    Rate: 646
    The connection of the plastic bowl to the bottom of the dishwasher is made of silicone (enough to withstand temperatures up to 180 ° C) can be folded.
    PS .
    Three days ago my hu ... shot through the spill from the bowl. A new pump plus a silicone leak seal and the topic taken care of. If I don't forget, I will put a photo with a water separator system. In the mode on the 3rd photo there is a notch that should match the notch in the rotary aperture with holes, that's all theory I will check tomorrow.
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  • #3 16773901
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    edit: 22 Oct 2017 10:38
    I thought so too and folded it. If anything, I will sell a functioning pump motor, as if someone had fired, please let me know.
    edit:
    Well, the pump has been ordered, nothing more than to fold, and it is a pity that the heater cannot be replaced.
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  • #4 16775095
    bubu64
    Level 22  
    Posts: 590
    Help: 57
    Rate: 282
    falo22 wrote:
    Three days ago my hu ... shot through the spill from the bowl. A new pump plus a silicone leak seal and the topic taken care of.

    I'm afraid he won't last long. Roofing sealant lasted the longest, silicone for about three months :)
  • #5 16777041
    zielinskii
    Level 16  
    Posts: 181
    Help: 20
    Rate: 111
    There is no silicone available, and the O-ring and heater can be bought and replaced.
  • #6 16782078
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    It is not possible to replace the heater in this model, it is combined with a metal something and embedded in a plastic housing. As for silicone, I think it will do its job.
  • #7 16782118
    domel.an
    Level 24  
    Posts: 497
    Help: 57
    Rate: 135
    lensa wrote:
    It is not possible to replace the heater in this model, it is combined with a metal something and embedded in a plastic housing. As for silicone, I think it will do its job.

    Believe the word, it can be exchanged ?
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  • #8 16782149
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    Well, I do not insist, but the heater about 200 PLN, and the entire pump 360 PLN so it works, but I have one grasp. As you can see in the picture I cleaned one part before and I have to set the cog, sometimes you don't know how it should be? I folded so that I covered the notch visible on the cog with the marker on the second one but I see that there is no proper pressure on the "windmills".
  • #9 17069764
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    I put together and works ok.
    As if someone needed such a pump with a burner heater I invite you. Engine Works.
  • #10 17508530
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    Hello again after a year.
    This time I had a problem E 04. I dismantled the dishwasher there was some water on the tray but not too much. Standard review. Drying. Seeing the motherboard because the dishwasher was washing but with cold water. I checked the relays, improved February at the heater output. After folding, she hulked like gold for 2 weeks. Yesterday again E 04 but it pounded the difference. I am at home. I stripped. Pump pulled out and pain here. Dripping from under the heater.
    And here a request for help. How to seal the heater in the housing. The pump lasted a year. And I don't have a receipt, and I took it apart from the thread guarantee.
    Damn. Is such sealing feasible?

    Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor Bosch SMV53M70EU Dishwasher: Error E9, Replacing Pump & Heater, Assembling Gear Motor
  • #11 17509475
    falo22
    Level 25  
    Posts: 630
    Help: 89
    Rate: 646
    Put a new O-ring into the pump body and after a problem.
  • #12 18225577
    lensa
    Level 11  
    Posts: 37
    Rate: 2
    O-rings cannot be used for this heater, it is for pumps with a narrower heater.
    Dishwasher dismantled, new purchased.
    residues for sale.
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Topic summary

✨ The Bosch SMV53M70EU dishwasher is experiencing an E9 error, prompting the user to replace the pump and heater due to a leak from the O-ring and a damaged heater. The heater is integrated into the housing, making replacement difficult. Users discuss the assembly of the gear motor, emphasizing the importance of proper alignment of cogs and holes. Suggestions include using silicone for sealing, although its longevity is questioned. The discussion also covers the challenges of sealing the heater and the necessity of using specific O-rings for compatibility. Some users have successfully repaired their dishwashers after similar issues, while others seek advice on sealing methods and component replacements.
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FAQ

TL;DR: On Bosch SMV53M70EU, E9 often follows a heater/pump leak; silicone fixes can last “about three months.” [Elektroda, bubu64, post #16775095]

Why it matters: This FAQ helps DIYers diagnose E9/E04, choose parts, and align the water-selector gear without repeat failures.

Quick Facts

What does error E9 mean on a Bosch SMV53M70EU?

E9 in this thread followed a leak at the O‑ring that shorted the integrated heater. The heater is embedded in the circulation pump housing. Users saw E9 after dismantling and confirming a burnt heater and leakage signs. If you see E9 with wet traces under the heater/pump, prioritize sealing and heater integrity checks before control-board work. Replace the failed assembly or components as needed. [Elektroda, lensa, post #16769823]

Can I replace only the heater, or must I buy the whole pump?

One contributor states the O‑ring and heater can be bought and replaced, so a full pump may not be required in all cases. Availability depends on the exact pump/heater variant. Inspect your unit’s heater style before ordering parts. If your supplier lists the heater and gasket kit by model, you can attempt a heater-only swap. [Elektroda, zielinskii, post #16777041]

Why do some users say the heater cannot be replaced on this model?

Another user reports the heater is bonded with metal parts and molded into the plastic housing, making removal impractical. In that case, replacing the complete pump/heater assembly is the workable fix. This view reflects teardown experience on a specific SMV53M70EU unit and aligns with their purchasing choice. [Elektroda, lensa, post #16782078]

How do I align the water-selector gear motor during reassembly?

Match the notch on the mode gear to the notch on the rotating aperture with holes. This sets correct port timing for water distribution. Clean parts, find the molded notches, and seat the gear without forcing it. Misalignment reduces pressure at the spray “windmills” and weakens wash action. [Elektroda, falo22, post #16770731]

Should I use silicone to seal the plastic bowl-to-base joint?

Yes, the bowl-to-base connection is assembled with silicone sealant. Use a silicone rated to approximately 180 °C and apply a continuous bead on a clean, dry surface. Allow full cure before test runs. This restores the original sealing approach for temperature and vibration tolerance. [Elektroda, falo22, post #16770731]

How long do silicone repairs typically last here?

A forum user reported roofing sealant lasted the longest, while silicone held for about three months. Treat silicone as a stop‑gap, not a permanent fix. Revisit sealing surfaces, and consider new gaskets or assemblies to extend service life beyond a single season. This is a common failure pattern after leaks. [Elektroda, bubu64, post #16775095]

What gasket or O‑ring fix stops a leak under the heater?

Install a new O‑ring in the pump body where the heater/pump joins. Clean grooves, lightly lubricate the new O‑ring with dishwasher‑safe grease, and reassemble evenly. As one user put it, “Put a new O‑ring into the pump body and after a problem.” [Elektroda, falo22, post #17509475]

Can I place the main bottom gasket on silicone instead of replacing it?

The forum guidance shows the bowl-to-bottom interface is silicone-sealed from the factory-level assembly. If the original gasket is integral or degraded, resealing that joint with appropriate high-temp silicone is acceptable. Ensure surfaces are fully degreased and dry before applying sealant. [Elektroda, falo22, post #16770731]

What does error E04 indicate in this case?

In this thread, E04 appeared with water in the tray, cold washing, and a drip from under the heater. After drying, relay checks, and minor board touch‑ups, the code returned until the leak was addressed. Fix the leak at the heater/pump area to clear E04 reliably. [Elektroda, lensa, post #17508530]

Did the repair hold over time? Any stats?

The user reported the dishwasher worked well for about two weeks after board rework, then E04 reappeared due to a heater-area leak. They also noted “The pump lasted a year.” Plan for proactive sealing or part replacement to avoid recurrences within months. [Elektroda, lensa, post #17508530]

Will disassembling the pump/heater affect warranty claims?

One user said they lacked a receipt and had dismantled the unit, which undermined their guarantee options. If your appliance is under warranty, avoid disassembly and contact service first. DIY teardown can complicate or void coverage depending on policy. [Elektroda, lensa, post #17508530]

How do I quickly reassemble the water‑selector gear motor?

  1. Clean both gears and the rotary aperture; find the molded notches.
  2. Align the gear’s notch with the aperture’s notch; seat gently.
  3. Reinstall the motor and test for normal spray pressure. [Elektroda, falo22, post #16770731]

Where can I find a replacement pump or motor if only one part failed?

A participant offered a functioning pump motor after replacing their combined pump/heater. Community marketplaces or repair forums may have working subassemblies parted from failed heaters. Verify the exact model and connector style before purchasing to ensure drop‑in fit. [Elektroda, lensa, post #17069764]

What if O‑rings don’t fit my heater style?

A user noted that available O‑rings did not suit their heater, which matched pumps with a narrower heater variant. If sizes mismatch, sealing will fail. In such cases, replacing the entire pump/heater assembly is the reliable route to stop leaks. [Elektroda, lensa, post #18225577]
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