Energy saving devise light blinking and no hot water

Call whirlpool / they will ask for serial number
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html#part

Gene

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) Electric water heater can be repaired, no need for new one.
Copy following links:
http://waterheatertimer.org/images/Water-heater-ther-ele-600.jpg
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html#veryhot

2) Ordinary homeowner can turn 6-year electric tank into a lifetime tank.
http://waterheatertimer.org/How-to-maintain-water-heater.html

3) If you replace heater, then buy inexpensive tank-type from local box store, and use coupon or offer 10% off. Read the product manual.
Avoid tankless at all costs unless you are rich.
No need to buy expensive water heater on the promise of thicker insulation or higher energy factor, or 'lifetime elements' or 'advanced technology', any other slicker promotion aimed at folks with the promise of a golden rainbow of money-saving-bliss if only you would spend more money. All costs are energy. Expensive water heaters do not pay back, and 1 repair will dissolve all anticipated savings. And expensive heaters can never be maintained to last as long as ordinary tank-type electric.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) Bad thermostat or thermistor depending on model.
Whirlpool/Craftmaster/American energy smart has control box on top, and you can order parts from Whirlpool.

2) Copy following links to help identify product.
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html

3) Add a comment with more detailed information:
You have electric water heater.
Unknown brand, possibly energy-smart.
Unknown control box.
Cut off? Do you mean 'reset' is tripped?

4) Whirlpool energy smart requires 10 gauge wire and 30 amp breaker.
Control panel may not function with undersized electric supply.
Control panel has blinking-light errors ... if no error code then maybe the control box is bad.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) Copy following links for whirlpool energy smart resources:
http://waterheatertimer.org/pdf/Energy-Smart-troubleshooting-guide.pdf
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html

2) Control box is probably bad.
There are 2 types of control boxes for older-style energy smart water heaters.
You will need model number and serial number from label on side of tank to order from Whirlpool.

3) This older-type energy smart water heater is probably discontinued by AO-Smith, American, State, Craftmaster, Reliance water heater group that makes Whirlpool and Kenmore water heaters.
New generation energy smart offers interface with home automation and/or non-existent smart grid.
Older energy smart only offered potential interface with non-existent smart grid.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Copy following links:

Electric water heater:
http://waterheatertimer.org/How-to-troubleshoot-electric-problems-with-water-heater.html
Gas water heater:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
Tankless water heater:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

1) Call Whirlpool. 1-877-817-6750
Have them send 2 new thermistors (temperature sensors located above each element), and then install according to the instructions they give you.

2) Sounds like you have the American brand older energy-smart electric water heater with grey control box on top
Copy following link to exactly identify product and resources
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html#energy-old

3) Two flashes is 'high water temperature shut down.
Buy cheap multimeter from hardware store. Install battery. Set to read ohm, the upside down horseshoe symbol.
Use multimeter set to read ohms, and test thermistors
Copy following link for general service manual showing error #2 and thermistor resistance chart on page 10
http://waterheatertimer.org/pdf/Energy-Smart-troubleshooting-guide.pdf

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

e2 is not shown among common error codes:
Error e2 might be: Brownout condition or too low of voltage to thermostat. Double check wiring and check for 24 vac between R and C. E2 will clear 15 sec after proper voltage is restored.

Before calling service technician, open following link for Rheem troubleshoot resources including Rheem chat and typical generic manuals and common error codes:
http://waterheatertimer.org/Troubleshoot-Rheem-Tankless-water-heater.html

Model number and serial number are required for Rheem contact, and then they tell you what error code means without saying how to fix it, and then tell you to call service technician.

Tankless water heater manuals each say to have qualified technician perform yearly service. Most causes for common error codes are covered by yearly service.

Yearly service is fairly standard in the HVAC and water heater industry with advancement of high-tech 'energy' saving appliances. Of course all costs are energy, and the service call probably costs more that the 'energy' saved by energy-saving appliance. But with high tech stuff like tankless, it is good to have a reliable service guy who knows your machine.
http://waterheatertimer.org/images/Tankless-wiring-1200.jpg

The evidence points to a control malfunction.
Call Whirlpool for assistance: 1-877-817-6750
You will need your model number and serial number located on label on side of tank.
Serial number is required because models change as the technology evolves.

Open following link to read product details about the Energy Smart, and download typical manual.
http://waterheatertimer.org/Whirlpool-Energy-Smart-electric.html

Note: Energy Smart water heater requires 10 gauge wire and 30 amp breaker.

Typical energy smart manual shows: 1 flash is start-up error, which indicates 'Power ON with no water in tank.'
This is not possible because at least the upper element would burn out, if not both elements.
If upper element burns out, this water heater will not make any hot water, since it is wired for ordinary non-simultaneous operation.
There cannot be air inside the tank since your hot water faucet is not spewing air.
http://waterheatertimer.org/How-it-works.html

Also be aware that model numbers change.
Read following account of fellow who replaced control board on his 4-year-old energy smart, and how he discovered wires are reversed on newer control boards. Be sure to ask Whirlpool about this possibility, in the event they say control board is faulty and send you new board:
http://www.fixya.com/support/t8263226-our_water_heater_doing

An on-demand, or tankless, water heater is a system for heating water as it passes through the pipes, usually very near the point of use. Traditional tank water heaters bring the water to approximately 140 degrees Fahrenheit (60 C), in order to ensure the water supply lasts long after the heater turns off. Since this is obviously far too hot to be pumped out of a shower of faucet, cold water is added to the mix in the pipes. Coupled with the loss of thermal energy over time, the average tank heater has an efficiency of approximately 80%. On-demand water heaters have a number of advantages over their tank-using counterparts. While tanks often degrade over time and begin leaking, the apparatus used in an on-demand water heater is much less susceptible to the burdens of age, and will often outlive the house they're installed in. The amount of energy used is a fraction of that used in a tank water heater, due to increased efficiency and a much smaller window during which a heating source is in use. While tank hot water heaters can, and often do, run out of hot water after a number of showers, on-demand heaters provide a never-ending supply of hot water, ensuring that warm water is always available when needed. A tankless water heater can cost between $500 and $1500, and they most commonly use either electric or natural gas energy to heat the water. Most mid-sized households report an energy savings of approximately 25-45% for a gas or propane heater, and up to 50% with an electric heater, over using traditional tank heaters. Water is usually set to a maximum temperature of 120 degrees Fahrenheit (49 C), though many heaters allow for custom setting of the maximum temperature via remote control. Outflow rates range from 8-14 gallons (30-53 litres) per minute. Installation for most tankless water heaters is incredibly easy, involving simple plumbing. In the case of electric heaters, all that is required for a fuel source is to plug the heater into an outlet and begin heating your water. Some modern on-demand water heaters can incorporate a solar preheating system. This system uses a traditional solar heating system and tank to bring the water nearer to the desired temperature, saving substantial energy use in the final on-demand heating. A solar preheating system costs between $500 and $800.