Water Heater Upper Thermostat

This article deals with thermostats on electric water heaters.

Water heater upper thermostat.

And once the water has. A dual element water heater uses two heating elements controlled by two separate thermostats. When it goes bad you don t have any hot water at all. Electric water heaters have one or two elements and each is controlled by a thermostat.

Reliance 9000507 045 lower electric thermostat black 4 7 out of 5 stars 252. Rheem gas control thermostat natural gas model sp14270m part ap14270. When the water has cooled off the thermostats kick on the heating elements to heat the water. Usually when the upper thermostat goes bad you will have no hot water at all while a bad lower thermostat makes itself known when there is only a small amount of hot water before the tap water goes cold.

Adjusting an electric hot water heater temperature thermostat setting is a little more involved but still relatively easy. Testing the thermostats on a dual element water heater. Electric water heaters have a lower and upper thermostat one for each heating element. To test you will need a multimeter and screwdriver.

Since most electric water heaters use both an upper and lower element the process outline below is for them. You can pick up a good inexpensive multimeter online or any local hardware store. The upper element heats the upper portion of. Testing water heater thermostats is important in locating water heater problems.

This rheem marathon upper element thermostat is specifically designed to be used as the upper thermostat in a rheem marathon residential electric water heater. Rheem uv11699 therm o disc upper thermostat electric water heaters 3 9 out of 5 stars 7. How a bad thermostat causes your water heater reset button to trip. If the hot water heater is not working one of the thermostats may be bad.

The upper thermostat is the primary one that contains the high limit switch and the lower thermostat is used to detect the change in the temperature of the water. Many modern homes come with dual element water heaters. The upper thermostat controls both the upper and lower element. You can test them with the power off using an ohmmeter to measure resistance or with the power on using a voltmeter to measure voltage.

Testing the upper thermostat. It s not necessary that both thermostats will do the same work their work can vary according to the water heater unit. These water heaters often have a non simultaneous design which means that only 1 heating element is on at any given time. The majority of electric water heaters have two thermostats.

This type of thermostat is for use in 2 element water heaters. An upper and a lower located under two control panels.