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| Fault Localization of Electric Heaters | If an electric heater doesn’t work properly, it may have the problems with heating elements, the thermostat or the high-temperature cutoff. The upper and lower heating elements, submerged in water, are managed by thermostat that is hidden behind a panel on the side (the isolation should be cut away for access when the panel is removed). In case the high temperature cutoff has turned off because of the heated water, all you should do is to reset the button. High voltage and inaccessibility warrant a service call to mount the thermostat, reset the high-temperature cutoff or to change any of those constituents of the heating elements themselves.
Absence of hot water
Check for:
• The heater has no power.
• The safety thermostat has stopped functioning.
• Faulty heating thermostat.
• Faulty heating elements.
• Buildup of rust, crust or sediment in the tank or lines.
Solution:
• Test the automatic cutout.
• In case the heater constantly blows fuses consult an electrician.
• Press the reset button.
• Check the thermostat and heating elements.
• Examine the thermostat and change it if needed.
• Examine the elements and change if needed.
• Drain and wash out the tank and the lines.
The hot water supply is too low
Check for:
• Thermostat is mounted incorrectly.
• The tank is too tiny.
• Heat is getting loose in the lines.
• Faulty heating element.
• Leaking hot water taps.
Solution:
• Fix the thermostat to a higher temperature.
• Mount a bigger heater.
• Place the heater closer to the point of use if possible.
• Isolate the hot water lines.
• Examine the element and change it.
• Fix or change the taps.
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