Had a local guy repair a broken pipe in bathroom. They turned the water off at the street and then turned the water off at the water heater. Hours after they left, my son went to take a shower and ran out of hot water. We checked both "faucets" on the water heater. Made sure they were both open all the way. Hot water supply pipe was warm, evidence that we still have water being heated. Figured just not enough time to heat all water. HOWEVER, no one gets a full shower with hot water. It will feel hot at first, then turn cold. We have not run the dishwasher or washing machine right beforehand either. This hot water heater is electric and only 4 months old. What in the heck am I missing...or when they shut off the water, did it burn out an element? They did NOT turn off the power to the water heater, just the water supply.