Runs forever! even on Normal wash...help !!

Well you have done everything that you can do and expertly tested and diagnosed. The problem is doing all the towels together. The only way to fix is mix towels with other laundry or buy a front loader because the tumbling action evens out the load better.

Check and see if the drive belt broke? On mechanical agitators using gears, a solenoid may fail and drive motor won't function.

Whatr is the model number?

Sounds like the capacitor on the motor is bad,

What is the model number of the unit?

Your main switch needs replaced. The motor that drives the switch operates because it goes through the other cycles, so the switch must be bad.
murf427

They weren't lyin', with the new improved energy effeciency and cleaning units they using more "soaking" times to losen food particles to use less water and clean better. And that they deffinitly do versus old units and they save more energy by doing this also. On some makes and models theywill have cycles that still use less time but also will then use some more water during this cycle. My SEARS store "blue crew" did research and found out this cycle for me.

Today's dishwashers use less water and less electricity so the manufacturers have had to increase wash times to get good results. One hour is about normal for the "eco" cycle since it's always "sensing" the water turbidity (soil in the wash water) and water temperature, and making adjustments as necessary.
Your shortest wash cycle would be "delicate" but it might not give you the best results.

Check to make sure you heating element has not failed. Dishwashers of today heat the water periodically through out the cycle and if the element has failed. The heating delay light is the indicator that tells you that it is trying to heat the water.

try running it in service diagnostic and let it finish will check its self and clear error codes in less than 6 seconds push heated dry-normal-heated dry-normal and advise me