The Husqvarna freesia 415. The fabric is not feeding through - just sewing in the same spot. Is there an adjustment I can make to fix it?

Thick fabrics do not need to have a tension adjustment. The stitches will form just as nicely as on finer fabrics as long as the stitch was properly calibrated to start with.

If the sewing machine has a "pressure" adjustment, increase the pressure until the fabric is easily transported (moves easily under the presser foot).

The pressure adjustment is generally located on top of the machine right above the needle shaft. Some machine do not have this option.

What challenges are you encountering while sewing on heavy fabrics? Maybe I can be of more help with this information.

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try this link for parts

Are you talking about an "easy feed" attachment for a home machine? (it's not really a walking foot btw) If so just buy a new one for your length of shank on the Husky.

could be a safety switch problem
try changing the needle
rethread the machine top & bobbin--use every thread guide
clean under the needle plate & in the bobbin area for lint
if the problem persists the machine may need to be checked

Like the Freesia 425, the 415 has permanent lubrication and sould never need oiling.

For the Husqvarna Viking Freesia 415 sewing machine you need the small, push-in type. Here's the specifics:

Light Bulb, 12V 5W #979603-001

Here's a link to a site that has a pic of bulb and also sells them:

http://www.sewingpartsonline.com/light-bulb-12v-5w-979603-001.aspx

http://www.tradebit.com/filedetail.php/9214252-husqvarna-viking-freesia-415-425-user-manual

It's probably a blown fuse on the transformer. You'll need to take it in to your service tech, it's not something that's easily accessible for you to reach

I don't know how much help this will be for you, but here are the parts of the upper shaft.