the sensor is in the the lower filter tray in the back.
You need to check there that sensor will fail after a while due to humidity taking its toll.
The best place to get the new sensor is: http://www.ransomspares.co.uk/
I would call them to order the part and once you have it, you can find the old sensor because you will ow what it looks like;-)
Also I will help you replace that one once you have it
Please call ransom spares: 0844(###) ###-####a href="http://www.ransomspares.co.uk/" target="_blank">Home » Parts » Laundry Spares » Tumble Dryers » Whirlpool
In any case, I will stick with you until this is complete.
Please rate my service kindly.
Also it is the only way I am credited for my time and expertise with you.
Once you rate, I will be notified and will add your question to my priority list so you can reach me anytime until this problem is solved.
Then you can reach me by simply replying to this message anytime.
Thank you and have a great day Tim!