Why foot will not depress enough - Sewing Machines

Make sure the stitch length is set high enough to actually move the fabric. If the feed dogs are in the raised position and still do not move, they may be seized or something is disconnected. Take it for service.

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.

make sure the plug for the foot pedal is connected securely to the machine.
could be the plug in the machine has a problem even tho the foot petal is plugged in
could be the foot petal has gone out and needs to be checked.

Stop! You have a short. Take it in and demonstrate the issue to the tech.

I dont know about the Singer, but I frequently get this on older Bernina models. The foot controller has a suppressor capacitor across the regulator and, on the Berninas, these capacitors fail with age, mainly because they were not specified with a high enough operating voltage for UK markets. Depending upon model, this component might be separately wired directly across the switch contacts or might be on a small circuit board. It is usually rated at 250V - I now routinely replace these with modern parts rated at 1000V and never have returns.

it's possible that the foot pedal has gone out
check to make sure the power cord in inserted into the machine correctly & also the foot pedal

The only thing I can think of is that the foot pedal may be slightly stuck and not returning fully up after being depressed. Unplug the foot pedal and check for anything stuck there then give it a good wiggle up and down a few times.

check the connections, if they are good, your foot pedal has a short in it, so its not completing the circuit when depressed

Do you have a stitch pattern selected and a length chosen? Otherwise it does not know what you want to do. Sometimes companies neglect to tell you that little fact. Also, how about your bobbin winding shaft, is it pushed all the way to the left? Other than that I am baffled. Good luck.

Call Brother customer service at 1-877-276-8437 and threy will help you