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Michael, Customer Service
Category: Appliance
Satisfied Customers: 9568
Experience:  I have been an appliance repair tech for over 30 years and will help you solve your problems.
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Riccar sewing machine model 9900. The stitch selector -

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Riccar sewing machine model 9900. The stitch selector - green light goes up to 10 and the red light goes down to 18. Therefore, I am unable to select any stitch between 11 and 17. Can you help please?
Good morning I am sorry to hear that. How old is your sewing machine?
Also Does everything else seem to work correctly?
Thank you
Tech Michael
Customer: replied 3 years ago.

Everything is working fine but just can't turn knob at top to stitches 11 to 17.

Thank you for the reply, does the knob seem to be stuck, please explain.
Customer: replied 3 years ago.

Knob just seems blocked and wont turn any further. Machine was bought in late 70s.

Thank you for that info.
This is a failed switch is all. Its not very expensive but the task of replacing it would need to be done bu someone who can solder electronics. if you have electronics experience I can help you further, please let me know.
If not ant local sewing machine and vacuum repair shop can do this for you easily.
I can help you locate the part if you want to do this yourself but you will need a few basic good hand tools. I wish it were a simple fix I really do.
I will stick with you until this is fixed, please don't forget to rate my service to you before you close this page. I will be available to you at no additional cost , you can then get in touch with me anytime by simply replying to this message.
Thank you and have a great day !
Tech Michael
Michael and other Appliance Specialists are ready to help you
Customer: replied 3 years ago.

Thanks for your help. Have a good weekend.