JUKI HZL-70HW Common Problems and Troubleshooting


Welcome to our guide on addressing common problems and troubleshooting for the JUKI HZL-70HW sewing machine. In this article, we’ll delve into potential issues you might encounter while using this specific model of sewing machine and provide solutions to help you get back to smooth sewing.

JUKI HZL-70HW Overview

This JUKI HZL-70HW sewing machine is a versatile and feature-packed option for sewing enthusiasts. It comes equipped with a range of features that make sewing a breeze.

Product Description

The JUKI HZL-70HW is a computerized sewing machine that boasts a built-in sewing font. With its automatic threader and convenient plug-in bobbin, threading is a breeze. The machine offers adjustable stitch length and width, quick and easy threading with a built-in needle threader, front load bobbin, and a one-step buttonhole feature that creates consistent buttonholes according to your preferences. The machine also features an adopted Box Feed System, 180 stitching patterns including a font of letters, LED light, and a fine overcasting stitch, among other capabilities.

Product Details and Features

Automatic ThreaderAdjustable Stitch Length & Width
Box Feed System180 Stitching Patterns
Lightweight MaterialsButtonholes
LED LightFine Overcasting Stitch

Causes of Common Problems with the JUKI HZL-70HW

As we delve deeper into this article, we’ll explore the common problems users might face when using the JUKI HZL-70HW sewing machine and provide troubleshooting solutions to help you overcome these challenges.

Common Problems with the JUKI HZL-70HW

1. Thread Breakage During Sewing

Description: One common issue with the JUKI HZL-70HW is thread breakage while sewing, which can disrupt your stitching and cause frustration.

Cause: Thread breakage can occur due to incorrect threading, improper tension settings, or using low-quality thread.


  1. Ensure proper threading of the machine following the user manual guidelines.
  2. Check the tension settings for both the upper and lower threads. Adjust them if needed.
  3. Use high-quality thread suitable for your fabric.

2. Uneven Stitching

Description: Uneven stitching can lead to an unprofessional look in your sewing projects when using the JUKI HZL-70HW.

Cause: Uneven stitching might result from incorrect tension, a bent needle, or an improperly inserted bobbin.


  1. Check and adjust the upper and lower thread tension to ensure even stitching.
  2. Replace the needle if it’s bent or damaged.
  3. Ensure the bobbin is correctly inserted and wound evenly.

3. Skipped Stitches

Description: Skipped stitches are a common problem that can affect the final appearance of your sewing on the JUKI HZL-70HW.

Cause: Skipped stitches can occur due to a dull needle, improper needle size, or incorrect threading.


  1. Replace the needle with a new one to ensure it’s sharp and in good condition.
  2. Ensure you’re using the correct needle size for your fabric.
  3. Check the threading of the machine and make sure it follows the correct path.

4. Bobbin Thread Tangling

Description: Tangling of the bobbin thread can lead to jamming and disruptions while sewing on the JUKI HZL-70HW.

Cause: Bobbin thread tangling can be caused by an improperly wound bobbin, incorrect bobbin insertion, or lint buildup in the bobbin area.


  1. Wind the bobbin evenly and ensure it’s inserted correctly in the bobbin case.
  2. Clean the bobbin area from lint and debris regularly.
  3. Check that the bobbin case and surrounding components are properly seated.

5. Fabric Not Feeding Smoothly

Description: If your fabric is not feeding smoothly through the JUKI HZL-70HW, it can result in uneven stitching and frustration.

Cause: Poor fabric feeding can be caused by incorrect presser foot pressure, dull feed dogs, or using the wrong stitch length.


  1. Adjust the presser foot pressure according to your fabric’s thickness.
  2. Check and clean the feed dogs for any lint or debris buildup.
  3. Ensure you’re using an appropriate stitch length for the fabric you’re working with.

6. Needle Thread Bunching Underneath

Description: Needle thread bunching underneath the fabric can result in messy and inconsistent stitches on the JUKI HZL-70HW.

Cause: This issue can be caused by incorrect threading, an improperly inserted bobbin, or mismatched thread and fabric.


  1. Rethread the upper thread, ensuring it follows the correct path.
  2. Check the bobbin and bobbin case for proper insertion and any tangled thread.
  3. Use thread and fabric combinations that are compatible.

7. Machine Making Unusual Noises

Description: Unusual noises coming from the JUKI HZL-70HW while sewing can indicate an underlying problem.

Cause: Noises can be caused by loose parts, foreign objects in the machine, or a need for lubrication.


  1. Tighten any loose screws or components on the machine.
  2. Check for any debris or foreign objects in the bobbin area and remove them.
  3. If the machine requires lubrication, follow the user manual’s guidelines for proper lubrication points.

8. Stitches Puckering or Gathering

Description: Puckering or gathering of fabric around stitches can lead to an unsightly finish on the JUKI HZL-70HW.

Cause: This issue can occur due to incorrect tension settings, using the wrong stitch type, or sewing overly tight curves.


  1. Adjust the tension settings for both upper and lower threads to achieve the desired stitch appearance.
  2. Ensure you’re using the appropriate stitch type for your fabric and project.
  3. Be cautious when sewing tight curves, as excessive fabric manipulation can cause puckering.

9. LED Light Not Functioning

Description: If the LED light on the JUKI HZL-70HW is not working, it can hinder your visibility while sewing.

Cause: LED light issues can stem from a loose connection, a burnt-out bulb, or an electrical problem.


  1. Check the power connection of the LED light to ensure it’s securely connected.
  2. If the bulb is burnt out, replace it with a new one of the same type and rating.
  3. If the issue persists, it might be an electrical problem that requires professional repair.

10. Error Messages on the Display

Description: Error messages displayed on the JUKI HZL-70HW’s screen can indicate specific issues that need attention.

Cause: Error messages can appear due to incorrect settings, thread jams, or internal malfunctions.


  1. Refer to the user manual to understand the meaning of the specific error message.
  2. Check for any thread jams or tangles in the machine and clear them.
  3. If the error persists after troubleshooting, contact JUKI customer support or a professional technician for assistance.

11. Bobbin Won’t Wind Properly

Description: If the bobbin on the JUKI HZL-70HW isn’t winding correctly, it can disrupt your sewing process.

Cause: Incorrect bobbin placement, tangled thread, or a faulty bobbin winding mechanism can lead to this problem.


  1. Ensure the bobbin is inserted properly onto the winding spindle.
  2. Check that the thread is feeding smoothly and isn’t getting tangled during winding.
  3. If the issue persists, there might be a mechanical problem that requires professional attention.

12. Fabric Jamming in the Feed Dogs

Description: Fabric getting jammed in the feed dogs can halt your sewing progress on the JUKI HZL-70HW.

Cause: Incorrect fabric feeding, improperly aligned presser foot, or debris around the feed dogs can cause fabric jams.


  1. Guide the fabric gently and steadily to prevent it from bunching up in the feed dogs.
  2. Ensure the presser foot is aligned correctly and securely to prevent fabric misalignment.
  3. Clean the feed dogs area regularly to remove any lint or thread buildup that might be causing the jamming.

13. Uneven Tension Between Stitches

Description: Uneven tension between stitches can result in a visibly inconsistent appearance on the JUKI HZL-70HW.

Cause: Inconsistent thread tension settings, worn-out tension discs, or lint buildup in the tension mechanism can lead to this issue.


  1. Adjust the upper and lower thread tension settings to achieve balanced stitches.
  2. If the tension discs are worn, consider replacing them according to the manufacturer’s recommendations.
  3. Regularly clean the tension mechanism to prevent lint accumulation that could affect tension.

14. Needle Breakage During Sewing

Description: Needle breakage while sewing on the JUKI HZL-70HW can be frustrating and interrupt your sewing flow.

Cause: Using the wrong needle size, sewing through thick layers without proper needle support, or a misaligned needle can lead to needle breakage.


  1. Ensure you’re using the correct needle size and type for the fabric you’re sewing.
  2. Use proper techniques and support when sewing through thick layers of fabric.
  3. Check that the needle is securely inserted and properly aligned in the needle clamp.

15. Stitch Selector Not Responding

Description: If the stitch selector on the JUKI HZL-70HW is unresponsive, it can limit your stitching options.

Cause: Electronic glitches, connection issues, or button malfunctions can lead to the stitch selector not responding.


  1. Turn off the machine and restart it to see if the glitch resolves.
  2. Check the connections and cables to ensure everything is properly plugged in.
  3. If the problem persists, the machine might need professional repair to fix the button or electronic components.

16. Thread Looping on the Underside

Description: Thread looping on the underside of the fabric can result in messy and uneven stitching on the JUKI HZL-70HW.

Cause: Incorrect threading, improper bobbin tension, or a damaged needle can cause thread looping.


  1. Re-thread the upper thread, following the correct path and making sure it’s properly seated in the tension discs.
  2. Check the bobbin tension and adjust it if necessary, ensuring it matches the upper thread tension.
  3. Replace the needle with a new one to rule out needle damage.

17. Machine Not Powering On

Description: If the JUKI HZL-70HW isn’t powering on, you won’t be able to use its features and functions.

Cause: Loose power cable connections, a faulty power switch, or electrical issues can prevent the machine from turning on.


  1. Check that the power cable is securely connected both at the machine and the power outlet.
  2. Test the power outlet with another device to ensure it’s working properly.
  3. If the machine still doesn’t power on, there might be a problem with the power switch or internal electronics that requires professional repair.

18. Stitch Length Inconsistency

Description: Inconsistent stitch length can result in irregular-looking seams on the JUKI HZL-70HW.

Cause: Incorrect stitch length settings, worn-out feed dogs, or inconsistent fabric feeding can lead to this problem.


  1. Adjust the stitch length settings according to your desired outcome.
  2. If the feed dogs are worn, consider replacing them to ensure consistent fabric movement.
  3. Practice smooth and consistent fabric feeding techniques to prevent variations in stitch length.

19. Bobbin Case Jamming

Description: The bobbin case jamming in the JUKI HZL-70HW can cause disruptions and affect stitching quality.

Cause: Incorrect bobbin insertion, debris accumulation, or a misaligned bobbin case can lead to bobbin case jamming.


  1. Ensure the bobbin is inserted correctly in the bobbin case with the thread feeding in the correct direction.
  2. Regularly clean the bobbin case area to prevent lint and debris buildup.
  3. If the bobbin case is misaligned, consult the user manual to properly adjust it or seek professional assistance.

20. Uneven Feed Dog Movement

Description: Uneven movement of the feed dogs on the JUKI HZL-70HW can result in uneven stitching and fabric distortion.

Cause: Debris buildup, worn feed dog components, or incorrect presser foot pressure can cause uneven feed dog movement.


  1. Regularly clean the feed dog area to prevent lint and thread buildup that can hinder smooth movement.
  2. If the feed dogs are worn, consider replacing them to ensure consistent fabric feeding.
  3. Adjust the presser foot pressure according to the fabric being used to promote even feeding.

21. Skipped Stitches on Thick Fabrics

Description: Skipped stitches specifically on thick fabrics can impact the durability of your sewing projects using the JUKI HZL-70HW.

Cause: Thick fabrics can put extra strain on the machine, causing the needle to skip stitches if not handled properly.


  1. Use the appropriate needle size and type for thick fabrics to prevent skipping.
  2. Slow down the sewing speed when working with thick layers to avoid overwhelming the machine.
  3. Consider using a walking foot or engaging the machine’s feed dog drop for better fabric control.

22. Uneven Buttonhole Formation

Description: Inconsistent buttonhole formation can lead to difficulties in sewing closures on the JUKI HZL-70HW.

Cause: Incorrect buttonhole settings, improper fabric placement, or worn buttonhole foot can cause uneven buttonholes.


  1. Review the buttonhole settings and adjust them to match the fabric and button size.
  2. Ensure the fabric is properly aligned and secured before starting the buttonhole stitch.
  3. If the buttonhole foot is worn or damaged, replace it for more consistent results.

23. Fabric Puckering on Lightweight Materials

Description: Fabric puckering on lightweight materials can lead to unsightly seams when using the JUKI HZL-70HW.

Cause: High tension settings, using a regular presser foot, or sewing at a high speed can cause fabric puckering on lightweight materials.


  1. Reduce the tension settings to prevent excessive fabric gathering on lightweight fabrics.
  2. Use a walking foot or a presser foot designed for lightweight fabrics to prevent uneven feeding.
  3. Sew at a moderate speed to give better control over fabric movement.

24. Thread Tension Inconsistency

Description: Inconsistent thread tension across different stitches can lead to a mismatched appearance on the JUKI HZL-70HW.

Cause: Incorrect tension adjustments for different stitch types or fabric layers can result in tension inconsistency.


  1. Adjust the thread tension for each stitch type according to the machine’s manual and your fabric’s thickness.
  2. Practice on a scrap fabric to find the right tension settings before sewing on your actual project.
  3. Keep a record of the tension settings for different stitch types for reference.

25. Fabric Feeding Askew

Description: If the fabric feeds askew or crookedly through the JUKI HZL-70HW, it can lead to uneven seams.

Cause: Incorrect presser foot alignment, uneven fabric feeding, or improper guide placement can cause crooked fabric feeding.


  1. Ensure the presser foot is aligned parallel to the fabric edge to prevent skewing.
  2. Guide the fabric smoothly through the machine, avoiding any uneven tension that can cause misalignment.
  3. Use guides or markings on the machine to keep the fabric feeding straight and aligned.

JUKI HZL-70HW Sewing Machine User Reviews

Reading user reviews can provide valuable insights into the real-world experiences of individuals who have used the JUKI HZL-70HW sewing machine. Let’s explore what users have to say about their experiences with this machine.

Positive Reviews from JUKI HZL-70HW Sewing Machine Users

  • Some users were satisfied with the following parameters associated with the JUKI HZL-70HW:
    • Reliable performance on a variety of fabrics.
    • Ease of use, making it suitable for beginners.
    • Consistent stitch quality and tension.
    • Versatile stitch patterns for creative projects.
    • Lightweight and portable design for easy transportation.
    • Helpful features like the automatic needle threader and LED light.

These positive reviews highlight the machine’s reliability, user-friendly features, and the ability to handle various sewing tasks effectively.

Negative User Reviews of the JUKI HZL-70HW Sewing Machine

  • Some users were not satisfied with the following problems associated with the JUKI HZL-70HW:
    • Difficulty in adjusting tension and thread-related issues.
    • Bobbin winding problems and thread jamming in the bobbin area.
    • Uneven stitch formation and fabric puckering.
    • Issues with the machine’s durability and reliability.
    • Experiences of machine jamming during sewing.
    • Challenges with setting up the machine and getting consistent results.

These negative reviews shed light on certain areas where users encountered challenges or had less favorable experiences with the machine.

Overall, the majority of users expressed satisfaction with the JUKI HZL-70HW sewing machine, highlighting its value for money, ease of use, and reliability.

These insights from users provide a balanced perspective on the JUKI HZL-70HW sewing machine’s performance, features, and overall satisfaction.

JUKI HZL-70HW Sewing Machine Manual

If you’re looking for the JUKI HZL-70HW operating instructions, you can find them on the manufacturer’s official website. The manual provides detailed guidance on how to set up, operate, and maintain your sewing machine. Refer to the manual for a comprehensive understanding of the machine’s features and functions.

JUKI HZL-70HW Common Problems and Troubleshooting

Frequently Asked Questions

  • Q: Why is my thread constantly breaking?

    A: Thread breakage can result from various factors, including incorrect threading, tension issues, or using a damaged or incorrect needle. Check your threading, adjust the tension, and ensure you’re using the appropriate needle for the fabric.

  • Q: How do I prevent fabric puckering?

    A: Fabric puckering can occur due to tension problems, incorrect presser foot choice, or sewing too quickly. Make sure your tension settings are balanced, use the right presser foot, and control your sewing speed to prevent puckering.

  • Q: What should I do if the machine jams while sewing?

    A: If the machine jams, stop sewing immediately. Gently remove the fabric, check for any tangled threads or fabric pieces in the bobbin area, rethread the machine, and ensure the bobbin is wound correctly.

  • Q: How do I adjust the stitch length and width?

    A: The stitch length and width can usually be adjusted using the machine’s controls. Consult your manual to find the specific settings for adjusting stitch length and width. These controls allow you to customize your stitches according to your needs.

  • Q: Why is my machine producing uneven stitches?

    A: Uneven stitches may be due to inconsistent tension settings, fabric misalignment, or issues with the feed dogs. Check and adjust the thread tension, make sure the fabric is feeding evenly, and ensure the feed dogs are clean and functioning properly.


Remember, your JUKI HZL-70HW sewing machine is a versatile tool with various features and functions. If you encounter any issues or problems, always refer to the manual provided by the manufacturer. Additionally, if the problems persist or if you need assistance, don’t hesitate to reach out to customer service or a certified service center for professional help and guidance.

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