I have the kenmore HE3 front loading washer. While washing a load last night it started
Flashing F on the screen. Does anyone no what this means?

I had the same problem. The manual does not state the problem. I contacted SEARS and they sent someone out. On the panel board, if you remove it check for loose wires loose from the high spin. If you don't feel good about taking off the front plate and your still under warranty call for service. They will try to tell you they fixed it, but watch out.
Guess what, 2 days later the same problem. I took the extended warranty at time of purchase and thank GOD they had to replace the motherboard.

Also with my F flashing I found the water not draining and it all had to do with getting the loose wires behind the panel.

Hope you are still under warranty. I would never buy this product again. Next time I will stick with Whirlpool even though I believe the HE3 are made by Whirlpool.

Good Luck