Quick model summary
Bosch Dishwasher SGX78C55UC
10 sourced model-specific records
Record the exact display message and complete model suffix before using a troubleshooting guide.
This guide covers the Bosch SGX78C55UC, a 800 Series 24-inch stainless steel built-in dishwasher listed for the United States. Bosch confirms PrecisionWash, CrystalDry, AquaStop Plus and 42 dBA sound output on its official product page. Here you will find safe next steps for common symptoms, an explicitly general Bosch code reference, and the official place to find documents. The exact E-Nr revision, model-specific fault-code list and control reset sequence have not been established from the material reviewed.
Bosch 800 Series Dishwasher 24-inch, Stainless steel SGX78C55UC Error Codes
10 source-linked error symbol(s) are listed for this model or an explicitly applicable model family. Verify applicability before a model-specific procedure.
| Error symbol | Reason | Fix / Solution |
|---|---|---|
| E:20-60 | Heating element calcification detected. Possible causes: The appliance has detected scale on the heating element. | Safe check: Follow the manual's dishwasher-descaling instructions; use the water-softening system if fitted and appropriate. Expected result: The display warning may clear after the cause has been corrected. If unresolved: Consult the matching manual's descaling and water-softening instructions before running another cycle. Safety: Use dishwasher-compatible descaler and follow its label. Do not open internal heating components. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.46 Section 17, Troubleshooting, printed p.46; water softening depends on appliance specification. |
| E:21-30 | Zeolite-container air intake obstructed by dishware. Possible causes: Dishware covers the intake opening of the Zeolite container. | Safe check: After the dishwasher is safe to open, rearrange dishware so the intake opening is clear. Expected result: The intake is unobstructed; monitor whether the message reappears. If unresolved: Refer to the appliance diagram on manual p.11 for intake location. Safety: The Zeolite outlet can be hot. Allow the dishwasher to cool and do not touch the outlet. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.46 Section 17, Troubleshooting, printed p.46; appliance diagram p.11. |
| E:30-00 | Water protection system activated. Possible causes: Water protection has activated; the manual does not diagnose a specific faulty part. | Safe check: Close the water supply valve. Do not attempt an internal repair. Expected result: Water supply is shut off pending assessment. If unresolved: Contact Bosch customer service as instructed in the manual. Safety: Shut off water supply; keep clear of leaks and electrical connections. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.46 Section 17, Troubleshooting, printed p.46. |
| E:31-00 | Water protection system activated. Possible causes: Water protection has activated; the manual does not give a component diagnosis. | Safe check: Close the water supply valve and leave the appliance for service. Expected result: Water supply is isolated pending service. If unresolved: Contact Bosch customer service. Safety: Do not continue operation while water protection is activated. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.46 Section 17, Troubleshooting, printed p.46. |
| E:32-00 | Water supply fault or water-inlet warning. Possible causes: Closed water supply valve, kinked/blocked inlet hose, or restricted supply valve. | Safe check: Check that the accessible water supply valve is open. Avoid manipulating inaccessible inlet hoses or fittings. Expected result: Normal supply resumes if the cause was a closed valve. If unresolved: The manual describes ending the wash cycle and starting it again after restoring water supply; refer to p.35. Safety: Avoid working on pressurized water lines or internal electrical parts. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.46-47 Section 17, Troubleshooting, printed pp.46-47; cycle termination on p.35. |
| E:34-00 | Water is continuously entering the appliance. Possible causes: Continuous water entry; the manual does not identify a specific replaceable part. | Safe check: Close the water supply valve. Expected result: Incoming water is shut off while waiting for service. If unresolved: Contact Bosch customer service. Safety: Shut off water supply and do not continue using the dishwasher. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.47 Section 17, Troubleshooting, printed p.47. |
| E:61-02 | Drain pump cover loose or foreign object obstructing pump. Possible causes: Pump cover not seated or an object blocks the drain pump. | Safe check: Follow the manual's drain-pump cleaning procedure and ensure the cover clicks into place, only if accessible and safe. Expected result: The pump path is clear and cover securely installed. If unresolved: Refer to the manual's Clean drain pump section on p.60. Safety: Disconnect electrical power before cleaning the pump; beware sharp objects. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.47 Section 17, Troubleshooting, printed p.47; Clean drain pump, p.60. |
| E:61-03 | Water not draining; drain path restriction or installation issue. Possible causes: Disposal knockout plug present, drain hose kink, loose pump cover, foreign object, missing high loop, or drain-hose blockage. | Safe check: Check accessible drain hose for kinks and disposal connection; follow the manual for drain pump inspection if safe. Expected result: Drain flow may recover when the physical obstruction or installation issue is corrected. If unresolved: Check the disposal connection and hose high loop; use the manual's pump-cleaning directions. Safety: Switch off power before pump cleaning. Do not dismantle plumbing under pressure. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.47-48 Section 17, Troubleshooting, printed pp.47-48; pump cleaning p.60. |
| E:90-01 | Low supply voltage. Possible causes: Insufficient electrical supply voltage. | Safe check: Stop troubleshooting the appliance electrically; contact a qualified electrician to assess supply voltage. Expected result: The electrician determines whether the electrical installation supplies proper voltage. If unresolved: Have the electrical installation checked by a qualified electrician. Safety: Do not open live electrical equipment or test supply voltage without qualifications. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.48 Section 17, Troubleshooting, printed p.48. |
| E:92-40 | Filters dirty or blocked. Possible causes: Soiled or obstructed filter system. | Safe check: Clean the dishwasher filters as described in the manual. Expected result: The filters are clear and correctly reassembled. If unresolved: See Cleaning filters on manual p.43; check whether the display returns. Safety: Allow the dishwasher to cool; handle possible sharp debris carefully. Applies to: Bosch SGX78C55UC, US base model shown on this manual; /XX production revision not separately verified. Recorded source Bosch SGX78C55UC Use and Care Manual, document 9001964586_B, printed p.48 Section 17, Troubleshooting, printed p.48; filters p.43. |
A code identifies a condition, not a confirmed failed part. Older saved codes without the new evidence-tier field should be manually rechecked against official model documentation.
Safety first
Stop using the dishwasher if you see active leakage, smell burning, or notice damaged electrical parts. Keep clear of hot water and steam, and do not remove electrical panels, work on wiring, or force a pump cover. If there is a leak, shut off the water supply if you can do so safely. For an E15 indication, Bosch instructs users to shut off incoming water and contact support; this is general Bosch guidance, not a confirmed code for this specific model.
Quick help
| What you see | Safe next step | When to request service |
|---|---|---|
| A code or flashing indicator | Copy the exact letters, numbers and pattern, then check the full rating-plate E-Nr. Codes below come from a general Bosch US list; none is confirmed here for SGX78C55UC. | When the warning stays, returns, or is accompanied by leakage or loss of operation. |
| Standing water after a cycle | Stop the cycle and, when cool and safe, follow Bosch’s general drain advice. Read the matched manual before removing the filter or any pump cover. | If draining does not resume, water leaks, or the pump area cannot be accessed safely. |
| Dishes remain wet or dirty | Leave space between items; check rinse aid instructions and that spray arms are not obstructed. See Bosch’s general cleaning advice. | If cleaning or drying stays poor despite the safe checks in the matching manual. |
Error codes and display messages
Evidence limit: No fault-code list tied to the full SGX78C55UC E-Nr variant was verified. This is not verified, not a claim that these codes cannot occur. Bosch’s public US dishwasher guide groups codes across multiple dishwashers; it does not confirm every code for this model.
General Bosch dishwasher error-code references
| Display family | Meaning in Bosch US general guidance | Source and model status |
|---|---|---|
E15 | Leakage protection reports water in the dishwasher base. | Bosch US general code guide Not confirmed for SGX78C55UC |
E18 | Bosch describes a low water level or incoming-water flow issue. | Bosch US general code guide Not confirmed for SGX78C55UC |
E22 / E-22 | Bosch associates this display with a blocked dishwasher filter. | Bosch US general code guide Not confirmed for SGX78C55UC |
E24 / E-24 | Bosch describes a drainage problem; the filter, hose or connection may be obstructed. | Bosch US general code guide Not confirmed for SGX78C55UC |
E25 / E-25 | Bosch says the drain pump may be blocked or its cover loose or missing. | Bosch US general code guide Not confirmed for SGX78C55UC |
E09 | Bosch identifies a heat-pump internal-heater fault. | Bosch US general code guide Not confirmed for SGX78C55UC |
The slash-separated E-22, E-24 and E-25 forms are named in Bosch’s general reference. Do not infer that either display is supported by SGX78C55UC. For an unfamiliar message, record a photo and confirm it with Bosch US before attempting a repair.
Common problems
These are Bosch US general-care checks, not steps taken from a verified SGX78C55UC E-Nr manual. Match the E-Nr before opening any access point or selecting a mode.
Does not start
What you notice: The cycle will not begin or controls appear inactive. What to check: Make sure the door is fully closed and the appliance has power. Bosch also advises checking for a control lock, if the model provides one. When to stop: Do not bypass a latch or repair an electrical control; request service if the problem remains. Bosch start troubleshooting.
Does not drain
What you notice: Water remains after the wash. What to check: Bosch recommends inspecting and cleaning the filter according to your own manual. Leave any pump-cover work until the exact instructions are available; debris may be sharp. When to stop: Request service for persistent drainage failure or suspected damage. Bosch drainage help.
Wet or poorly washed dishes
What you notice: Water droplets, film, or food residue. What to check: Keep dishes separated, avoid blocking spray arms, and use rinse aid only as directed by the correct manual. Do not select a drying feature merely because a different Bosch model offers it. When to stop: If normal loading and maintenance do not help, use Bosch support. Bosch drying tips.
Manual and support
First read the full E-Nr, including the characters after the slash, on the appliance label. Bosch lists manuals and other documents on its US product listing. That page is a document finder, not a direct PDF manual; confirm the version before following instructions.
- Find Bosch SGX78C55UC manuals and documents (official product page)
- Bosch US dishwasher owner support
- How to find the appliance model number
- How to find the matching appliance manual
Manual verification: The Bosch product listing contains a manuals-and-documents area, but the exact full E-Nr manual title, revision date, and applicable pages were not verified. No model-specific reset or diagnostic sequence is supplied here.
Sources and author
- Bosch US: SGX78C55UC official product specifications and document area
- Bosch US general dishwasher error-code reference
- Bosch US dishwasher troubleshooting guidance
- Bosch US dishwasher drain troubleshooting
- Bosch US dishwasher drying advice
By Ahmad Raza. Last checked: 2026-10-15. No technical reviewer is listed.
The Bosch US product listing confirms the stated product identity and features; error-code applicability and full-E-Nr procedures remain unverified. This appliance was not physically inspected or tested.
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