reduce the water leakage

reduce the heat loss

increase the life of water heater

limit the load current

In kilo ohms

Zero ohm or few ohms

Infinity

High resistance in mega ohms

Thermostat contacts are welded together

Thermostat does not disconnect the heater from the supply

Open in the thermostat contacts

Thermostat set too high or out of calibration

Leakage around the thermostat

Thermostat setting is too low

Leakage around heating unit flange

Grounded heating element

Thermostat contacts are in open condition

Thermostat contacts are welded together

Thermostat is set in too high range

Thermostat does not disconnect the heater from the supply