Wash cycle selector knob on Samsung Jumbo Twin Tub washing machine model SWT90C1P broken

SOURCE: Wash cycle does not start!

if only rinse cycle work. it mean the cycle timer in no good. you need to replace it. i will tell you the cost of it later.

SOURCE: How to remove the washer cycle selection/start-stop knob on a Whilpool Heavy Duty Thin Twin stacked washer dryer

I believe the selector knob on a Whirpool just has to be turned counter-clockwise with the selector pushed in. It will spin off the shaft and then the outer indicator dial will pull off. The shaft also has a keyed slot that will only allow the dial to be removed and installed one way, so there should be no question as to how it goes back on.

Was there a reason as to why you are removing the washer selector knob? If this is a simple matter of replacing a broken water temperature selector, you shouldn't have to remove any of the control knobs to gain access to the selector. The entire front panel comes off by removing the screws holding it in place. That way you can access the broken selector from behind the front panel much easier. Just remove the panel right above the washer top (under the dryer) and it should expose the front panel mounting screws. Remove these screws and the front panel comes off. Just make sure the unit is unplugged before you begin. I hope this helps you. Let me know if you need further assistance.

SOURCE: The Cycle selector Knob of

The timer motor is bad. I am assuming that you can move the timer by hand and access all cycles. Usually this means a whole new timer. You can try to order the motor seperately but it is usually not available alone. The new timer can cost around $100. Why don't you try a used appliance store and see if they will sell you one. The timer motor is fairly standard. The timer itself is not. Just buy a used timer and swap motors.

SOURCE: cycle selector knob wore out, washer fills, but barrel won't turn

try installing new knob, but it could be bad timer.

SOURCE: washer not going in cycles

Where you attached the new hose on the side of the tub, you must remove that hose and insert a small wire in the hole in the cup and clean out the soap scum. Re-attach the hose. Set the washer on spin and run a spin cycle. Then retry your wash cycle.
Make sure the new hose is not pinched anywhere.