If you are getting no supply of water from the heater, then you need to check the water supply to the unit. Before you check the supply, make sure that you have switched off the power supply to the water heater. If there is a low voltage, then the unit may not be able to perform in a right manner. Also check for the fluctuation in the electrical supply to the unit. Another problem that is faced by most of the home owners who have electric hot water heaters or who have the traditional storage water heater is the improper temperature of the water. Always remember to set the desired temperature so that you will get the water in the right heating temperature. Many new water heaters come with thermostat and that is the first place you need to get checked if you are not getting the proper temperature of water.
If you are noticing water droplets in the tank or below the water heater unit, then you need to get the water heater checked for leakage. The leakage must not be taken lightly, as it may also cause the unit to burst. Make sure that the joints are sealed in a right way. If the seam of the unit is leaking, it is advisable to call in a professional to get it checked and repaired. If you see the operational light of the unit flickering, then you need to get the power supply of the unit checked. Many times the power is not supply in a right manner and in electric hot water heaters, this may lead to the damage of heating element.
Last but not the least, there are time when the unit completely stops functioning and it is highly recommended that you call in the professional to get it checked. Always remember, never try to do this as DIY process as it may cause you harm. If the heater is not coming on after switching, then there might be problem with the pressure unit and a quick visit to technician will solve the problem. If you have an anew heater that has stopped working then call the company from where you have brought it to avail the warranty on the unit. Many new age electric hot water heaters come with 10-15 years of warranty.