Brand: AEG
Category: Sewing Machines
Document Type: Manual
Language: EN
Available Languages: EN , ES
Manual for 791/795
Uploaded: April 20, 2026, 8:01 p.m.
Warranty Information
This sewing machine is intended for household use only.
Basic Operation Summary
This manual guides users through the setup, operation, and maintenance of the AEG 791/795 sewing machine. Key operations include:
- Preparation: Attaching accessories like the extendable cloth plate, understanding the freearm function, changing the needle and presser foot, spooling the bobbin, and threading the upper and lower threads.
- Sewing: Selecting stitch types (utility and elastic), adjusting stitch length and tension, and sewing basic stitches, utility stitches (straight, zigzag, blind stitch, etc.), and elastic stitches.
- Special Techniques: Instructions are provided for sewing on buttons, creating buttonholes (including corded ones), and inserting zippers.
- Maintenance: Regular cleaning of the hook and feed dog, and oiling the machine are detailed to ensure optimal performance.
- Troubleshooting: A comprehensive table addresses common problems like thread breaking, skipped stitches, fabric puckering, and machine malfunctions with suggested solutions and corresponding page references.
Safety precautions are emphasized throughout the manual to ensure safe and proper use of the sewing machine.
Troubleshooting and error codes
| Problem | Cause | Solution | Page |
|---|---|---|---|
| Upper thread breaks | Upper thread is not correctly threaded. | Rethread upper thread. | 18 |
| Upper thread tension is too tight. | Lower upper thread tension. | 20 | |
| Needle is bent or dull. | Replace needle. | 12 | |
| Needle is not inserted properly. | Insert needle properly. | 12 | |
| Thread is either too thick or too thin. | Choose the right thread referring to the needle and thread chart. | 13 | |
| Lower thread breaks | Bobbin case is threaded incorrectly. | Bobbin case is threaded incorrectly. | 17 |
| Bobbin case and/or hook are blocked by lint. | Clean bobbin case and/or hook. | 49 | |
| Bobbin case is damaged or malfunctioning. | Replace bobbin case. | 15 | |
| Needle breaks | Needle is not correctly inserted. | Insert needle correctly. | 12 |
| Needle is bent or dull. | Replace needle. | 12 | |
| Needle clamp screw is loose. | Tighten needle clamp screw. | 12 | |
| Upper thread tension is too high. | Lower upper thread tension. | 20 | |
| Needle is too thin for the fabric to be sewn. | Use appropriate needle. | 12, 13 | |
| Skipped stitches | Needle is not correctly inserted. | Insert needle correctly. | 12 |
| Needle is bent or dull. | Replace needle. | 12 | |
| Neither needle nor thread are right for the fabric to be sewn. | Use the correct needle and thread for the fabric. | 13 | |
| Upper thread is not correctly threaded. | Rethread upper thread. | 18 | |
| Fabric puckers | Upper thread tension is too high. | Reduce upper thread tension. | 20 |
| Threading is not correct. | Rethread the machine. | 18 | |
| Needle is too thick for the fabric. | Choose the right needle referring to the needle and thread chart. | 13 | |
| Stitches are too long for the fabric to be sewn. | Reduce stitch length. | 22 | |
| For very thin materials: No non-woven lining has been applied. | Use non-woven lining. | ||
| Stitches form loops | Upper thread tension is too low. | Increase upper thread tension. | 20 |
| Needle and thread are not right for the fabric to be sewn (too thick or too thin). | Use the correct needle and thread size by referring to the needle and thrad chart. | 13 | |
| Fabric does not feed properly | Feed dog is blocked by lint and fluff. | Clean the feed dog. | 50 |
| Feed dog is lowered. | Raise the feed dog. | 24 | |
| The stitches are too short. | Increase the stitch length. | 22 | |
| Sewing machine will not sew | Machine is not connected properly. | Connect machine properly. | 8 |
| Thread has got entangled in the bobbin case positioning finger. | Clean the bobbin case and/or the hook. | 49 | |
| Handwheel is set for winding bobbin. | Set handwheel to its original position. | 16 | |
| Sewing machine is slow or noisy | Thread has got entangled in the bobbin case positioning finger. | Clean the hook. | 49 |
| Feed dog is blocked by lint and fluff. | Clean the feed dog. | 50 | |
| Machine is not lubricated properly. | Oil the machine. | 51 |