Hello, this is Dave and I'm happy to help you.
If it was a blinking clean light indicates that there was a problem heating the water. It may be the water was too cold or it could be a problem with the heater or door switch in series with the heat circuit. To restore your DW to operation you need to run the diagnostic cycle. Here is how to enter and advance through.
To start diagnostics, press the following keys in order in less than 6 seconds
Heated dry, Normal, Heated dry, Normal
To rapid advance one interval at a time, press the Start key. When you get to the end your DW will operate again. If there really is a problem in the heat circuit the clean light may begin to blink again after you use it a while.
Some models use different buttons. Here are other possibilities so you can know what to use on your model.
Heated dry or HIGH TEMP SCRUB, (POWER SCOUR), (HIGH TEMP SCOUR) or (SANI RINSE)
Normal or AIR DRY, (NO HEAT DRY) or (ENERGY SAVER DRY)