Whirlpool Ultimate Care 2 only works if I hold the Timer Knob

Can only be a few things

high temp fuse
high limit thermostat
failed element.

VIDEO

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Parts

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Sounds like the knob is not on correctly, or is not the correct knob, or the plate with the numbers on it has moved. When it turns off naturally, does that line up with 'off'?

Dryer Won't Stop Running

• Ultimate Car II Dryers are fitted with a mechanical timer that sends an impulse to the control circuit board to stop running once the set amount of drying time has elapsed. This is because, should an electronic timer fail, this would necessitate the replacement of the entire circuit board. Confirm that the mechanical timer is indeed broken by opening the dryer's door. If the dryer stops, the circuit board is working fine and is not the problem. Simply slide off the protective faceplate of the dryer, unscrew the control board beneath, and flip it over. Connected to the back of the timer's knob should be a small round device with two wires running to the circuit board within the body of the dryer. Unscrew this device from the back of the knob and disconnect the wires. A replacement timer costs a few dollars and should screw into place without trouble. Reconnect the wires and put the dryer back together. It should work fine now.
  
• If you need a new timer the best place ti get it is from Rough River Appliance Repair
• Phone number is (270) 230-1818 his name is Charlie and he is the best!
  

The timer cam is not aligning the internal switches. Replacing it is the only fix.
Eric

I have a problem with my Whirlpool IMperial electric dryer, not a Duet gas dryer.

make sure the door is closed all the way and set it to the cycle you want and push the timer knob in and hold it for a second to start it.

on the back of the timer is a black plastic tab, you have to pull out on this tab in order to remove the knob. in other words you have to take apart the control panel to get to the timer just to take off the knob. :I

element or thermal fuse at top of element housing most likely if either is bad ck vent system before using very long plugged vent can cause overheat long dry times and premature failure of element

possible timer fault does it spin