TIMER KNOB JUST SPINS - Bosch Nexxt 500 Plus WFMC5301UC

The threads either on the timer knob (part number 3364291) and the timer dial ( Part number 3957849, the larger part of the timer with arrow) are worn. Pull the knob off and inspect the threads. Replace the part with the worn threads.

The knob itself turns the switch on . The skirt move the timer position. Try turning the skirt. You probably have a broken knob. On these the knob is held in place with a plastic rod inserted into it all the way. This spreads the tip and retains the knob. To get the knob off to yank out the skirt for a look see you need to pull that rod out a tad to release the knob. That shaft has a rounded end on it that spreads out and locks the knob on. Clever ain't it? These timers are cheaply made, if you cannot find fault with the knob or the skirt then you is gonna need a timer.


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check the back of your knob to see if there is a crack. where the shaft of the timer goes if so call the parts store and order a new knob. Will need your model number when you call them. If its not the knob then its your timer.

If it's your timer knob, you will have to replace the timer. Call or email us with your model number and brand and we will send you the proper part right away. We hope this solves your washer issue for you.

Replace the timer knob

"Can I replace it with a new knob or do I have to buy a new timer?"

It sounds like the knob is rounded out where it fits on the timer post, or It may just be loose. Pull the knob off and inspect it. If damaged, yes, you can buy another one.

Something in the timer came apart. Timer needs replaced. When in good working order, the timer should ONLY ever be turned clockwise..Reversing this could break it.

If the knob is tight on the timer stem, then the timer has failed.

If the knob is loose, then maybe just the knob has failed.

You can order either of these from a number of places. One I recommend is searspartsdirect.com. YOu just enter your model number and find the exploded view for the controls. If it does not find it, drop a number off the end of the model number that you've given and try again.

They are easy to replace.

Reply back and I can give you more advice or instruction.

timer is bad in that spot replace timer