Water heater is not 100% identified.
Unknown if this is gas or electric heater.
Problem posted under Whirlpool water heaters typically made by American water heater company.
Call Whirlpool 877-817-6750.
They will ask for model number and serial number located on label on side of tank.
Call is answered in USA by trained person who can answer specifics about that model, including warranty, age, regular maintenance, error codes, and possible solution for that specific model and serial number.
I have found these folks to be helpful.
Whirlpool manuals do not show that specific model:http://www.whirlpoolwaterheaters.com/support/manuals.aspx
If you have the energy smart electric water heater with electronic control board, then error code explanation shows on the control board. Error 1 or a single flash, is start-up failure and requires tank to be full of water. Read page 10 of manual. Make sure water heater is full of water and water is coming full stream out of tub spout before turning on power. Also disconnect power from unit, make sure water heater is full, and then reconnect power to see if unit resets. http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.htmlhttp://www.whirlpoolwaterheaters.com/downloads/6510306.pdf