whirlpool ultimate care 2 stops, not door switch

[dwolf]

My whirlpool ultimate care 2 stops midway. From internet searching I was sure it would be the lid switch so for a test I by passed it. Well it still stopped. All I need to do to get it going again is pull the big knob of and on again and then it finishes ?? So what should I be looking at next.  The entire knob assembly ??? I imagine that is not cheap.   Thanks

Model Lsq9659lw0

Can the timer be sprayed with electrical contact cleaners ? 

Edited August 23, 2016 by dwolf
added model number

[Whitegoodshelp]

I'm not familiar with this machine but if the big knob also turns the washing machine on and off by pulling and pushing it may be that the contacts inside are faulty. They could be burning due to a poor connection and high current passing through them. It wouldn't normally be possible to get to these contacts and it's unlikely to be just dust - more likely burned connection contacts. It would normally need replacing and as you say quite expensive and involved.

However, if it always stops in exactly the same place it may well be something different as poor contacts would be random (unless it always stopped when calling for the heater which suddenly increases power consumption).