Upper thread tension very loose on mc15000 and not sewing


Melanie Dumas
 

My machine was serviced at Janome headquarters this year and was working ok for awhile, but now I'm experiencing a lot of loose upper thread. After threading and rethreading the machine and sewing for about an inch I keep getting an error message telling me to rethread the machine. I am at a loss and I don't want to keep bringing my machine in for a simple fix if there is one. Can anyone please explain what I'm doing wrong?

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