My whirlpool thin twin washer filled with water and then did nothing else, had to take the clothes out as it won't wash or drain, what is wrong with it?

No cannot over ride set at large doe the machine fill to a certain level then stop if so operating correctly if it never stops filling with water then there is a leak in the fill system either a hole in pressure switch hose it popped off tub or water leaking out thru drain system pump or siphoning thru hose again if unit starts to agitate there is enough water in unit per design

you need to vacume out all the water so you make it light, then dolly out the washer to some place you can drain it. now take off the front of the washer and locate your water pump, its attached to your drain line. take off drain line to water pump and see if anything is clogged in the pump. This is most likely what is wrong if it wont drain. hope this helps.

Either the motor or the gearcase is failing. You'll want a technician to verify the diagnosis.

check the lid switch,open the lid and on the right side you'll see a hole in the top panel,stick a screw driver in it,push down,you should hear a click,or close the lid and open it a couple of inches and close it,do this a few times,no clicking sound bad lid switch.

The basket drive and or clutch need replacing, as long as their isn't the added weight of the water it spins yet add 250 pounds of water weight its slipping

WASHER FILLS WITH WATER, THEN WON'T AGITATE. TURN KNOB TO SPIN AND IT DRAINS THEN SPINS. STILL WON'T AGITATE please show me a diagram

first access the tech sheet and run any diagnostics it shows for the machine and if this passes,then check/change the fill switch on the control panel along with fill tube from the wash tub base if kinked or plugged

Well if it fills then it needs the lid shut to work. So if the lid is shut it hits a lidswitch and if that lid switch is broken then nothing will work washer wise right? As far as the dryer that may be a blown fuse but nothing on the washer could stop it from running cept maybe a bad cord or breaker.

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Not sure about the dryer but there are a couple things that could cause the no draining issue.
You could have a leak or block in your pressure hose. Basically there is a thin, clear tube inside the cabin that attaches to the tub on the lower right side. If this has a leak or is clogged then the washer has problems filling and draining.
The other possible problem is a broken lid switch. This is an easy fix. Basically, the mechanical mechanism that goes down when you close the lid does not work properly so when it comes time to drain, the washer actually thinks the lid is open.
For both of these you would need to open cabin. I posted instructions for that here:
http://www.fixya.com/support/t1885690-whirpool_twin_washer_dryer_lte5243dq3