Janome Error Codes: Full List by Machine Model
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Quick answer: Janome error codes are model-specific. Find the exact model on your machine’s label, then match the whole message, including any colon. Start with the model guide below. Do not buy a motor, adjust timing or turn an internal tension screw just because an online code list suggests it.
A code such as E:05 is not interchangeable with E5. Even machines sold under the Memory Craft name can have different warnings. The lists below separate the verified MB-4S operator codes from QCP warnings and older numeric-code enquiries.
Safety first: switch off and unplug before cleaning or accessing the needle area. Stop using the machine if there is a burning smell, damaged wiring, grinding or a hard mechanical jam. Do not force a carriage or needle bar, open electrical housings, or enter a service-test routine as a general reset.
Which Janome family is your machine?
- MB-4 / MB-4S / MB-7: see the MB-series section. The table is specifically checked against the MB-4S manual; match other models to their own book and controller.
- MC7700QCP and other QCP models: see E1–E7 and F-code guidance. The code’s appearance alone does not identify your machine.
- MC10000 / MC10001: see the older numeric-code section and the retired-model manuals.
- A written warning on a Memory Craft screen: see message-based checks. Written messages also occur on some older machines.
MB series commercial machines: E:00 to E:09
The following is an operator-level summary for the MB-4S, checked against Janome’s instruction book, printed page 86. A recurring error after the manual’s remedy needs dealer assessment, not improvised service adjustments.
| Code | Meaning | First check |
|---|---|---|
| E:00 | RCS communication problem. | Switch off, then restart. |
| E:01 | Initialisation failed. | Switch off, then restart. |
| E:02 | Needle-bar change did not complete. | Switch off, then restart. |
| E:03 | Needle-bar stopping position error. | Use ENTER as instructed in the manual. |
| E:04 | Motor stopped under excessive load. | Locate the jam; disconnect power before clearing accessible tangled thread. |
| E:05 | Needle thread broken or depleted. | Follow the MODE/rethreading procedure. |
| E:06 | Needle-bar selection setting error. | Use MODE and confirm the needle-bar number. |
| E:07 | Automatic cutting error. | Switch off, then restart. |
| E:08 | Tension discs open during stitching. | Use the tension-release lever as the manual shows. |
| E:09 | Upper-shaft stopping position error. | Switch off, then restart. |
Keep hands clear when restoring power. If the same code returns, photograph it and stop. A code describes a detected condition; it does not prove which part needs replacing. In particular, E:09 is not a reason on its own to order a new motor.
Memory Craft QCP machines: E1 to E7 and F codes
For the MC7700QCP, use the Problems and Warning Signals section, printed pages 90–91. It separates control-circuit malfunctions, plate-converter problems and needle-position warnings. Other QCP models need their own manual.
| Display | Owner action |
|---|---|
| E1, E2, E3, E4, E5, E6, E7 | Match the exact display to the book. Janome directs control-circuit malfunctions to a service centre or supplying store. Do not run the machine simply to try to clear the code. |
| F1 | Check the manual’s plate-converter warning and permitted cleaning instructions. Do not run exposed-mechanism tests or adjust switches. |
| F2 | Check the manual’s needle-position warning. If it persists after permitted user checks, stop and arrange service; do not realign a sensor yourself. |
Important correction: do not assume E7 is harmless cutter overuse. The MC7700QCP book includes a separate warning for repeated cutter operation. Match the actual screen, not just a similar description in another model’s code list.
MC10000 and MC10001: plain numeric codes
If your screen shows a numeric error such as 01, 02, 04, 08 or 10, record the whole screen and exact model. We have not verified a manufacturer-approved, part-by-part decoding for those numbers in the owner documentation reviewed here, so we do not prescribe internal repairs from them.
Janome provides the three MC10000 books and the MC10001 book on its retired-model manual page. The MC10001 cleaning and troubleshooting sections, printed pages 173–175, cover ordinary thread, needle and bobbin problems. A persistent numeric fault is a separate reason to speak to a dealer.
Do not use a “16 clicks” tension-screw reset, push internal gears by hand or remove the base unit on the strength of a generic web guide. Normal user tension settings and service calibration are different jobs.
Newer Memory Craft models: written messages
For models such as the MC15000, MC12000, MC11000 and MC9900, start with the full wording and the instructions for that exact model. These are conservative first checks, not a diagnosis of a hidden sensor or motor.
| Message or symptom | First check |
|---|---|
| Calibration fails at startup | Stop. Check for an external obstruction and consult the setup instructions. Do not push the carriage to a forced “home” position. |
| Lower the presser foot | Check the foot’s position using the normal control. If the instruction is satisfied but the warning remains, report that to the dealer instead of assuming the switch has failed. |
| Pull down BH lever | Check the buttonhole lever and the buttonhole setup in the book. A repeating message is not permission to adjust internal sensors. |
| Attach P foot / embroidery foot | Confirm the required foot and attachment method for your model and mode. Do not defeat an interlock. |
| Rethread and start | Check the supply and complete threading path, with power off while working at the needle. A repeated warning has more than one possible cause. |
| Low bobbin thread | Check how much thread remains and whether the specified bobbin is fitted correctly. Do not recalibrate a sensor from a generic internet procedure. |
| Stop for safety / machine jammed | Switch off and unplug. Follow only the manual’s accessible jam-clearing steps. A continuing bind, unusual noise or overheating needs service. |
| Needle plate not attached properly | With power off, check the correct plate is seated as the manual shows. If the warning continues, stop rather than moving a detection switch. |
Only buy supplies after the basic checks. An error code is not a shopping list. Use the lint brush supplied with your machine if you still have it. If your manual calls for routine cleaning and that brush is missing, browse replacement lint brushes.
If the problem is a worn or damaged needle, first confirm its system, size and point in your model’s book. Then compare Janome needle listings, checking the exact pack’s compatibility. These are searches, not universally compatible parts or guaranteed error-code fixes.
Do not add oil as a generic reset. Oiling instructions vary by machine; use only the points, lubricant and schedule specified in the correct manual. A persistent motor, board or positioning fault belongs with a qualified technician.
Frequently asked questions about Janome error codes
Q: Why can I not find my Janome error code anywhere?
Search the exact model together with the entire code or sentence. Keep the colon if there is one. If your manual does not identify it, send a photo of the display to the supplying dealer; a similar-looking code from another machine is not a reliable diagnosis.
Q: What does E:01 mean on a Janome MB-4?
It is an initialisation warning in this code family. The verified MB-4S owner remedy is a restart. Check the original MB-4 book for your controller, and seek service if it repeats rather than manually repositioning the head.
Q: What does E7 mean on a Janome MC7700QCP?
Do not treat it as an instruction to keep sewing. Compare the display with the MC7700QCP warning chart and follow its service direction for a control-circuit fault. Repeated-cutter warnings are listed separately.
Q: My Janome says to lower the presser foot but it is already down. What now?
Confirm the normal setup and foot position in your model’s book. If the screen still disagrees, stop and give the dealer the model, message and a photo. The warning alone does not prove a microswitch is misaligned.
Q: Which Janome errors should I not try to fix myself?
Do not attempt internal electrical work, timing changes, sensor alignment or motor replacement from an online code list. Stay within the cleaning, threading and consumable-replacement tasks your owner’s manual permits. Persistent faults or signs of mechanical or electrical damage need professional service.
Still stuck?
Prepare five details before contacting support: exact model, full error, what the machine was doing, whether the error returns after the permitted checks, and any unusual noise or smell. Include a photo of the screen. This is more useful than ordering the component named in a generic error-code search.
Use Janome technical support or your supplying dealer. The linked manuals are the authority for operator procedures; this page is independent editorial guidance, not a Janome service manual.
Reviewed September 6, 2026. MB-4S code descriptions were checked against Janome’s printed page 86; QCP and older-model advice is limited to the owner documentation linked above. Product links are optional searches, not hands-on-tested remedies.
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