That unit has a timer, which should advance it through the cycle.
It is possible the timer itself is faulty and 'getting stuck'... but I find it interesting that you mention you are opening the door while it is spinning.
Your unit is a rebadged Frigidaire and are known to have issues with the door latch assembly.
If the door latch is faulty, that can effect how the unit operates.
It should lock itself and not allow you to open the unit while spinning as you say you are doing.
I would advise you to replace the door latch assembly. Also, check the striker on the door that mates with the door latch. It is possible that it is broken off into the latch as well.
That should resolve your issue.
Ok, that explains the discrepancy.
The issue should be related to the timer itself then. I am assuming the unit does everything else correctly? Fills with water, agitates, drains, and spins..
You should be able to stick your ear next to the machine and pinpoint if the noise is coming from the latch or from the timer.
Most times if the latch is faulty, it will cause the unit to not spin at all, or even sometimes for the unit not to even start and run.
The only reason I had even mentioned the latch to begin with was my confusion that you mentioned opening the door to get it to stop spinning.
Yes, if the timer is getting stuck, it needs to be replaced. There is no adjustment to be made.
You mentioned you had the front panel open, you should see the timer on the right hand side. Should be a direct swap, just take a picture or draw a diagram of what wires go where before you unplug anything.
Although they don't show your exact model, here is a similar one and the exploded diagrams may be of help to you- http://www.searspartsdirect.com/partsdirect/part-model/Sears-canada-Parts/Washer-Parts/Model-970C4003200/1781/0153200?searchedModel=970&blt=11
There, will be easier to click
Your best bet on making sure the current part # XXXXX your exact unit is to call Sears and ask them.
The timer is in the control panel, nowhere near the motor
The physical cycle time that you spin to pick a cycle.
#18 in this picture-