F3 error code

SOURCE: machine is telling me E6 error but there is no thread tangled

I am in the middle of fixing this same error. I phoned Brother service in Manchester and they are spot on. Give them a try, they talk you through the problem and suggest things to do to narrow down the cause. Make sure you have the model and serial number as this saves time. In extreem cases you can send your machine to them by parcel post and they will look at it free of charge and then give you an estimate for any repairs needed. If you decide not to go ahead, you can elect to have the machine returned to you for the cost of the postage.
In my case I bought the machine second hand off of E-bay and was getting the dreaded tangle/needle message. I phoned the service department and I was told to thread the machine up and switch on. Then they give you several things to try. Essentially you need to get someone to press the start button while you immediately turn the handwheel forward gently and smoothly.
If this stops the message coming up then you must suspect the motor or its fuse. In my case, it would seem the machine had been dropped as there was a hairline crack in the circuit board which stopped the power getting to the motor.

SOURCE: I keep getting an E6 error message - tangled

It could be that the bobbin is being put in upside down check to make sure that you do not need a bobbin with a magnet on one side. also make sure there is no thread tangled inside the bobbin housing it will cause the timing of the machine to be off and cause issues with your needle picking up the bobbin and thus cause a mess inside you bobbin housing

SOURCE: The machine is making a grinding noise and giving

I would call Brother at 1-877-276-8437, it may be a malfunction. They will be able to advise your where to take it for authorized service. Good luck

SOURCE: I am using my Brother

What kind of thread are you trying to use? Is it a decent fresh thread? If, it is old, throw it out and buy some fresh quality thread. Usually, cheap thread is the problem.

SOURCE: E6. Motor locked up because the thread is

In my Brother CE-4000, it appears as though the feed dogs (which you can change to a higher position or a lower position) are allowing the bobbin case to spin all the way around and then the needle hits the bobbin case. When the feed dogs are in the lowest position, the bobbin case does not spin all the way around when the needle moves up and down (and therefore the needle does not get stuck in the bobbin case. I am wondering if this is a problem with the feed dogs/case?