Solving problems with a Singer 4423 Heavy Duty Sewing Machine which runs on by itself

Ever had your Singer heavy-duty running on like it is possessed? At Cathedral Sewing Machines we had a machine in the workshop with that problem and it was an interesting fix!

Mark Oldis

6/1/20231 min read

Burnt out motor block Singer 4423
Burnt out motor block Singer 4423

In our workshop recently we had a Singer 4423 heavy duty sewing machine that just refused to stop running, even when the customer did not have their foot on the pedal. Normally, in a standard domestic machine, the culprit is the foot control where a small part has burnt out and needs replacing. This was not the case with the Singer 4423 and at first, we thought it was the motor but on closer inspection, it turned out to be a burnt-out motor block. Quick replacement and the machine had stopped running on by itself.