Whirlpool WDF310PAAS3 dishwasher stops after filling water.

Hi all,

I have this 5 years old Whirlpool WDF310PAAS3 dishwasher stops after filling water, and the machine stays power on.

Power stayed on, all buttons are working. If I press cancel and drain, water drained no problem.

Tried unplug the power, wait for 5 min and plug back on.

Tried trouble shooting by doing http://www.drdishwasher.com/troubleshoot...

All failed.

Could someone guide me what to do next please?

Thank you