The upper thermostat has two functions.
Upper hot water heater thermostat.
This type of thermostat is for use in 2 element water heaters.
Replace the upper thermostat.
A dual element water heater uses two heating elements controlled by two separate thermostats.
Then it allows power to go to the lower element.
The upper element heats the upper portion of.
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However you will need to know how to test a water heater thermostat to find the faulty unit.
The reading should be between 110 and 120 volts.
Rheem protech lower thermistor replacement kit for rheem performance platinum water heaters model sp15228 8 09 8 09.
First it allows the upper element to heat the water in the top of the tank.
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An electric hot water heater has two thermostats controlling two separate heating elements one in the upper half of the tank one in the lower half.
If you turn the hot water tap and cold water runs out then the upper thermostat is damaged.
When this water is hot enough it shuts the upper element off.
Touch one meter lead to the top screw and the other lead to the metal body of the water heater.
Repeat the test with the other screw.
But if the water is hot that becomes later becomes cold then you have a damaged lower thermostat.
As soon as you complete this task you can fix it.
An electric water heater has two thermostats located under access panels on the side of the tank.
This rheem marathon upper element thermostat is specifically designed to be used as the upper thermostat in a rheem marathon residential electric water heater.
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Water heater upper thermostat thermo disc style model 08163 11 54 11 54.
These water heaters often have a non simultaneous design which means that only 1 heating element is on at any given time.