Dechow 505A Common Problems and Troubleshooting

Welcome to our guide on addressing common problems and troubleshooting for the Dechow 505A sewing machine. As a proud owner of the Dechow 505A, it’s important to understand how to tackle any issues that might arise during your sewing endeavors.

Dechow 505A Overview

Here’s an overview of the Dechow 505A sewing machine along with its key features:

Product DetailsValue
MaterialStainless Steel, Acrylonitrile Butadiene Styrene (ABS)
Product Dimensions10.8″ x 4.7″ x 10.2″ inches
Item Weight5.3 pounds
Power SourceBattery-Powered, Corded Electric
Is ElectricYes

About this item

This sewing machine set comes with all the necessary accessories for sewing, including cotton fabric, a set of 12 colors of polyester sewing threads, and more. It features dual power supply modes (AC adapter and batteries), double switches for easy operation, and a high/low speed control. The portable size and beginner-friendly design make it a great choice for various sewing projects.

Product Features

  • Dual power supply: AC adapter and 4 AA batteries
  • Pedal switch and push button switch for easy start
  • Double Threads design for stronger stitching
  • Speed button for adjusting stitching speed
  • Portable size and suitable for beginners
  • Comes with instructional video for usage

Causes of Common Problems with the Dechow 505A

In the following subsections, we will address potential problems that you might encounter with your Dechow 505A sewing machine and provide solutions to resolve them.

Common Problems and Troubleshooting for Dechow 505A

1. Thread Tension Issues

Description: Uneven stitches, looping threads, or fabric puckering can occur due to incorrect thread tension.

Cause: Improper thread tension settings.


  • Ensure the machine is threaded correctly, following the threading guide in the manual.
  • Check the upper thread tension dial and adjust it to the recommended setting for your fabric.
  • Make sure the bobbin is inserted properly and the bobbin tension is adjusted correctly.

2. Needle Breakage

Description: Needles frequently break while sewing.

Cause: Dull or incorrect needle, incorrect threading, or sewing over pins.


  • Use the appropriate needle type and size for your fabric.
  • Thread the machine correctly, following the threading guide in the manual.
  • Remove any pins before sewing over the fabric.
  • Replace the needle if it’s dull or bent.

3. Uneven Stitching

Description: Stitches are uneven in length or tension across the fabric.

Cause: Incorrect presser foot pressure or improper threading.


  • Adjust the presser foot pressure according to the fabric thickness.
  • Check the upper threading and bobbin threading for any tangles or issues.
  • Re-thread the machine, making sure the thread is correctly seated in all guides and tension discs.

4. Jammed Bobbin

Description: The bobbin thread gets tangled, causing the machine to jam.

Cause: Improper bobbin winding or incorrect bobbin insertion.


  • Wind the bobbin evenly and make sure it’s placed correctly on the bobbin winder.
  • Insert the bobbin into the bobbin case with the thread unwinding in the correct direction.
  • Clean the bobbin area to remove any lint or debris.

5. Machine Skips Stitches

Description: The machine skips stitches or fails to catch the bobbin thread.

Cause: Incorrect needle threading, blunt needle, or incorrect bobbin insertion.


  • Check that the needle is properly inserted with the flat side facing the back.
  • Re-thread the upper thread, ensuring it’s passed through all guides and tension discs.
  • Replace the needle if it’s dull or damaged.
  • Check the bobbin insertion, making sure the bobbin thread is pulled through the tension spring.

6. Fabric Jamming in the Feed Dogs

Description: The fabric gets stuck or jammed in the feed dogs, preventing smooth feeding.

Cause: Incorrect fabric placement or feed dog height.


  • Ensure the fabric is placed correctly under the presser foot and behind the feed dogs.
  • Check the feed dog height adjustment and make sure it’s at the appropriate level for the fabric thickness.
  • Use a stabilizer or tissue paper under the fabric to help with smooth feeding.

7. Thread Bunching Underneath

Description: The thread bunches up and creates a tangle of stitches underneath the fabric.

Cause: Incorrect threading, bobbin issues, or incorrect needle threading.


  • Re-thread the upper thread, making sure it’s properly guided through all thread guides and tension discs.
  • Check the bobbin for tangles and ensure it’s inserted correctly into the bobbin case.
  • Thread the needle correctly, ensuring the thread goes through the needle’s eye in the right direction.

8. Uneven Feed of Fabric

Description: The fabric isn’t feeding evenly, causing uneven stitches or uneven seam allowances.

Cause: Uneven pressure on the fabric, incorrect presser foot, or feed dog issues.


  • Adjust the presser foot pressure according to the fabric type and thickness.
  • Ensure the correct presser foot is attached and properly secured.
  • Check the feed dogs for any debris or obstructions and clean the area if needed.

9. Motor Running But Needle Not Moving

Description: The sewing machine’s motor is running, but the needle isn’t moving to sew.

Cause: Disconnected drive belt, broken gears, or jammed mechanisms.


  • Check the drive belt to ensure it’s properly connected and not slipped off the pulley.
  • Inspect the internal mechanisms for any visible damage or obstructions.
  • If the issue persists, consider consulting a professional technician for repair.

10. Excessive Noise During Sewing

Description: The sewing machine produces loud or unusual noises while in operation.

Cause: Loose parts, debris in the machine, or lack of lubrication.


  • Tighten any loose screws, nuts, or bolts on the machine.
  • Remove the bobbin case and needle plate to check for any debris or lint buildup.
  • If applicable, apply a small amount of sewing machine oil to the recommended areas as per the user manual.

11. Skipped Stitches in Thick Fabrics

Description: The machine skips stitches or struggles to sew through thick fabrics.

Cause: Inadequate needle or thread for the fabric thickness.


  • Use a heavy-duty or appropriate needle for thicker fabrics.
  • Switch to a thicker, stronger thread that matches the fabric.
  • Go slowly when sewing through thick layers to reduce strain on the machine.

12. Uneven Stitch Length in Reverse Mode

Description: The stitch length becomes uneven or irregular when sewing in reverse.

Cause: Improper engagement of reverse sewing lever or tension issues.


  • Make sure the reverse sewing lever is fully engaged before sewing in reverse.
  • Check the upper thread tension and adjust it as needed.
  • Sew a few stitches forward before reversing to ensure proper tension adjustment.

13. Bobbin Thread Not Catching

Description: The upper thread sews, but the bobbin thread doesn’t form stitches.

Cause: Incorrect bobbin insertion, bobbin tension issues, or lint in the bobbin area.


  • Re-insert the bobbin, making sure it’s correctly threaded through the tension spring.
  • Adjust the bobbin tension if needed, following the user manual instructions.
  • Clean the bobbin area from any lint or debris that might obstruct the bobbin thread path.

14. Elastic Thread Breakage

Description: Elastic thread frequently breaks while sewing with stretch fabrics.

Cause: Incorrect tension settings or using the wrong type of elastic thread.


  • Use the appropriate elastic thread designed for the type of stretch fabric you’re using.
  • Adjust the upper thread tension to accommodate the elasticity of the thread and fabric.
  • Consider using a stretch needle to minimize tension-related issues.

15. Thread Keeps Tangling Around Bobbin

Description: The upper thread repeatedly gets tangled around the bobbin area.

Cause: Improper threading, bobbin winding issues, or incorrect bobbin insertion.


  • Re-thread the upper thread, following the threading guide in the manual.
  • Ensure the bobbin is wound evenly and inserted correctly into the bobbin case.
  • Check for any burrs or rough edges in the bobbin case that might snag the thread.

16. Skipped Stitches When Using Specialty Threads

Description: The machine skips stitches or doesn’t sew properly when using specialty threads.

Cause: Specialty threads have different characteristics that may not work well with default settings.


  • Adjust the tension settings to accommodate the unique properties of the specialty thread.
  • Consider using a larger needle size suitable for the thread’s thickness.
  • Test the thread on a scrap fabric to find the right tension and settings before starting the actual project.

17. Uneven Buttonhole Stitches

Description: Buttonholes sewn by the machine are uneven or inconsistent.

Cause: Incorrect buttonhole foot attachment or incorrect settings.


  • Ensure the buttonhole foot is properly attached and secured to the machine.
  • Follow the buttonhole instructions in the manual to select the correct settings.
  • Practice buttonholes on scrap fabric to fine-tune the settings before sewing on the actual garment.

18. Thread Breakage During Embroidery

Description: The thread frequently breaks when using the machine for embroidery.

Cause: Incorrect tension, inappropriate needle, or excessive speed for embroidery.


  • Adjust the tension settings specifically for embroidery threads and fabrics.
  • Use an embroidery needle designed to handle the thread and fabric layers.
  • Slow down the machine’s speed during embroidery to prevent excessive strain on the thread.

19. Motor Overheating

Description: The sewing machine’s motor becomes excessively hot during extended use.

Cause: Prolonged continuous operation or lack of ventilation.


  • Allow the machine to rest and cool down if you’ve been sewing for an extended period.
  • Ensure the sewing area is well-ventilated to prevent motor overheating.
  • Avoid using the machine at high speeds for prolonged periods.

20. Inconsistent Thread Tension

Description: The thread tension fluctuates during sewing, leading to uneven stitches.

Cause: Dirt or lint buildup in the tension discs, improper threading, or worn tension mechanism.


  • Clean the tension discs carefully using a small brush or compressed air to remove any debris.
  • Re-thread the machine, ensuring the thread is properly guided through all tension points.
  • If the problem persists, consult a technician to inspect and potentially replace the tension mechanism.

21. Needle Threader Malfunction

Description: The automatic needle threader doesn’t work as expected.

Cause: Misalignment, threading issues, or mechanical problems.


  • Check the alignment of the needle and the needle threader mechanism.
  • Ensure the needle is in the correct position for the threader to work.
  • Clean the threader mechanism and surrounding area to remove any debris.
  • If the issue persists, consult the user manual or seek professional assistance.

22. Fabric Doesn’t Move Under the Presser Foot

Description: The fabric remains stationary when you try to sew.

Cause: Feed dog disengagement, incorrect stitch length, or fabric tension.


  • Check that the feed dogs are engaged by using the feed dog control switch.
  • Adjust the stitch length to ensure the fabric advances as intended.
  • Ensure the fabric isn’t pulled too tightly, causing it to resist movement.

23. Uneven Light or Dim Light While Sewing

Description: The sewing area is unevenly lit or too dim to sew comfortably.

Cause: Bulb issues or improper lighting settings.


  • Check if the bulb needs replacement; use the appropriate type and wattage.
  • Adjust any lighting settings provided by the machine, if applicable.
  • Consider using an external light source or sewing in a well-lit area.

24. Irregular Bobbin Winding

Description: The thread winds unevenly onto the bobbin during winding.

Cause: Incorrect threading, bobbin winding tension, or bobbin winder issues.


  • Re-thread the machine according to the bobbin winding instructions.
  • Adjust the bobbin winding tension if your machine provides this option.
  • Ensure the bobbin winder is properly engaged and functioning smoothly.

25. Stitch Selector Not Functioning

Description: The stitch selector dial or buttons do not change the selected stitch.

Cause: Mechanical issues, dial misalignment, or electronic malfunction.


  • Gently turn the stitch selector dial to ensure it’s not stuck or obstructed.
  • Check if any part of the machine is preventing the dial from moving freely.
  • If the machine has electronic controls, ensure it’s powered properly and not frozen.
  • If problems persist, consult the user manual or contact customer support.

Dechow 505A Sewing Machine User Reviews

When considering a sewing machine like the Dechow 505A, it’s important to understand the experiences of other users. Below, we’ve compiled a collection of both positive and negative user reviews to provide a comprehensive overview.

Positive Reviews from Dechow 505A Sewing Machine Users

  • Many users were satisfied with the compact size and lightweight design of the Dechow 505A, making it convenient for various sewing needs.
  • Users appreciated the dual power options (AC adapter and batteries) as well as the easy-to-use pedal and push-button switches.
  • Positive feedback highlighted the machine’s ability to sew through a variety of fabrics, making it suitable for alterations, crafting, quilting, and more.
  • Several users mentioned the sewing machine set, which includes essential accessories like cotton fabric and a set of sewing threads, as a valuable addition.
  • Customers found the Dechow 505A to be an excellent choice for beginners, including children, with its user-friendly features and instructional videos.

Negative User Reviews of the Dechow 505A Sewing Machine

  • Some users experienced issues with the machine’s functionality, such as jamming, needle problems, and thread breakage.
  • Several customers expressed dissatisfaction with the quality and durability of the machine, including instances of the machine not working straight out of the box.
  • Negative feedback mentioned problems with the foot pedal, reverse sewing button, and overall machine performance.
  • There were complaints about the lack of responsiveness from customer service and difficulty in obtaining refunds or replacements.
  • A few users found the machine’s power and sewing capabilities to be insufficient for their needs, leading to frustration.

It’s important to note that the user reviews provided are based on experiences shared by individuals who purchased the Dechow 505A sewing machine. Each user’s experience can vary based on usage patterns, skill levels, and individual preferences.

Conclusively, the majority of users were satisfied with the Dechow 505A sewing machine, as evidenced by the high rating of 5.0 out of 5 stars. Positive feedback highlighted the machine’s compact size, ease of use, and suitability for beginners.

While there were negative reviews, they appear to be outweighed by the positive experiences of customers who found value in this sewing machine for their various sewing projects.

Dechow 505A Sewing Machine Manual

The operating instructions for the Dechow 505A sewing machine can be found on the manufacturer’s official website. For detailed guidance on how to set up, use, and maintain your sewing machine, please refer to the official manual provided by Dechow.

Frequently Asked Questions about Dechow 505A Sewing Machine

1. How do I set up the Dechow 505A sewing machine?

To set up the Dechow 505A sewing machine, refer to the instruction manual that comes with the machine. It will provide step-by-step guidance on how to assemble and prepare the machine for use.

2. Can the Dechow 505A sew through thick fabrics?

Yes, the Dechow 505A is designed to sew through a variety of fabrics, including thicker ones. It features a powerful motor that can handle thicker seams and fabrics, but it’s recommended to use the appropriate needle and thread for best results.

3. What should I do if the machine keeps jamming?

If you’re experiencing jamming issues, first check the threading and make sure there are no tangled threads in the bobbin area. Additionally, re-thread the machine following the instructions in the manual. If the problem persists, refer to the troubleshooting section in the manual or contact customer support.

4. How can I adjust the tension for different types of fabrics?

The tension settings can usually be adjusted using a dial or a knob on the machine. Refer to the manual for specific instructions on adjusting thread tension for different types of fabrics. It’s recommended to perform tests on scrap fabric before starting your project.

5. What if the needle keeps breaking?

Needle breakage can occur due to various reasons, such as using the wrong needle type, incorrect threading, or sewing too fast. Make sure you’re using the appropriate needle for the fabric, threading the machine correctly, and sewing at a moderate speed. If the problem persists, consult the manual for troubleshooting tips.

6. Can I use specialty threads with the Dechow 505A?

Yes, the Dechow 505A can work with specialty threads. However, it’s important to adjust the tension settings and needle size to accommodate the specific characteristics of the specialty thread. Always refer to the manual for guidance on using different types of threads.


For any issues or concerns with your Dechow 505A sewing machine, it’s recommended to consult the manual provided by the manufacturer. If you encounter problems that you can’t resolve, reach out to the customer service or an authorized service center for assistance. The manual and professional support will provide you with the best guidance to ensure the optimal performance of your sewing machine.

CRAFTBUD Mini for Beginners Adult Common Problems

LorSou FRJ005 Mini Common Problems

AUBNICO SEW-1 Mini for Beginners Common Problems

Leave a Comment