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Re: Husqvarna sewing machine
There is an electronic component called a supressor, used to filter interference by your machine to the power in your home which may cause radios & TVs etc to have sound crackle or lines on the image each time you press the pedal........it is not essential to the safe function of the machine, tho' domestic harmony may be strained if others are watching TV at the same time you sew............but it doesn't always cause interference even without the suppressor
You may also have noticed a small amount of smoke and an acrid smell when this component failed.
Generally they are located in the foot control, although some machines bury them inside the main body somewhere near the power inlet.
Ensure machine is unplugged and have a look inside the foot pedal for a rectangular "electronic" looking component with two stout wires.......it will probably be a brown yellow with oozing nasty thick brown gunge.....undo connectors and remove it ....wipe excess nasty stuff off and any associated residue with a fast drying solvent like denatured spirit or metholated spirit.
Now, with the offender removed, re-assemble foot control and you are back in business..............if the component is inside the machine, it will look the same, but the exact location may take some finding......open the base and look near the power inlet for something bearing the former description.
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First not familiar with exact product , however troubleshooting is common.
This is if pedal can be unplugged and you have access to volt meter (these are cheap enough under $20 and have other uses to support purchase) , set meter to measure continuity, set meter to lowest ohms to start. Before using on pedal touch the red and black leads together, touching the result should be zero on meter, not touching infinity or blank. Connect leads in various manners to the pins or sockets move pedal. If your meter reads a high number while moving pedal you have an open circuit.
If you see the meter fluctuate as you depress pedal that would be expected ( normal) but then when fully depressed go high ( open) your pedal switch is faulty. The variation in resistance as you push pedal slowly is what varies the speed.
You have to unplug the power cord to the the foot pedal. The manual doesn't include this. And good stinkin luck with Sears or Kenmore customer service! Just pull the cord out of the machine and the start/stop button will work. Try it on a slower setting at first though. Also, if you need additional presser feet, Singer, Brother, Janome, and possibly other brands will usually work as long as they are the snap on type. I really do like my machine, good luck with yours!
Mine does the exact same thing. I think the problem might lie in the cord to the foot pedal. The cord packs into the foot pedal for storage, which forces the cord to to remain bent during storage. I believe the wires in mind became damaged and broken so I took it apart and reconnected the wires at the spot where the connector meets with the wires. But I still don't leave it plugged in if I'm not using it, it could be a fire hazard.
There is no suppressor in the foot control of a 425. Only the control unit, which may need to be replaced. If the machine accelerates to full speed, it may have a problem with the "stop right" board which tells the machine whether to stop with the needle up. You could have several problems, so go see a qualified Husqvarna repairman. You may contact Husqvarna customer service to locate the best one in your area.