The normal button keeps flashing on my gold series that is a few years old

Sani Rinse is your only option mentioned here in the manual. This heats everything to 160'F and evaporates the water.

https://www.manualslib.com/manual/191224/Whirlpool-Gu1200xt.html?page=9

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Does it work intermittently, or did it fail suddenly?

Make sure there is nothing in the way of the door closing good. Sounds like something keeping it from closing good.

There is a trouble shooting document behind the kick panel at the bottom of the machine. Follow the steps to determine which component is at fault. It may be corrosion in the low voltage connector.
My whirlpool dishwasher gold GU2475XTVQ0 had rapid blinking lights that started with the "4 Hour Delay" LED and changed to others when other buttons were pressed. The machine would not run. I followed the instructions located behind the kick panel and verified the keypad was the issue and not the control circuit by elimination.
The big surprise for me was that when I used a straight pin to resistance check all of the buttons, they checked out OK. I reconnected the 14 pin connector (P1) to the control and found that the buttons/LEDs were behaving correctly! I believe that pushing the straight pin into the 14 pin connector removed any corrosion in the 10 year old device and permitted the keypad to communicate with the control again.
I reassembled the dishwasher door and it ran with no problems. I was ready to replace the keypad for $150, but didn't have to!

I own a 18-year-old Kenmore front-load washer so I'm not sure this will apply, but here goes... My washer requires me to press and HOLD the start button for a few seconds before it will start. At that point the door will lock and the washer goes through its startup phase. I think that is a "safety feature' to keep from accidentally bumping the button and starting the washer. See if that help. Good luck!

Probably a control board issuevv

I think there is something wrong with your graphics,you can cheak it or look wow gold sellers and wow gold seller

Did you ever find a solution? I have what sounds like the same problem. The time keeps ticking down but it flashes between CL and the time while the clicking sound is going, and it sometimes make a clunking sound while this is happening as well.

Sounds like you might need a new Start button.