Electric Hot Water Heater Thermostat

How electric water heater thermostats work.

Electric hot water heater thermostat.

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. When it goes bad you don t have any hot water at all. The upper thermostat controls both the upper and lower element. The top element heats the water first and then the bottom element kicks in.

Most electric hot water tanks have two elements and two thermostats. This article deals with thermostats on electric water heaters. Testing water heater thermostats is important in locating water heater problems. Many modern homes come with dual element water heaters.

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. The elements do not heat up at the same time. How to set the upper and lower thermostats on dual element water heaters. An electric water heater thermostat tells the heating elements when to heat up.

Set your store to see local availability add to cart. Free delivery with 45 order. 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. If the hot water heater is not working one of the thermostats may be bad.

Electric water heaters have one or two elements and each is controlled by a thermostat. Rinnai temperature controller for rinnai commercial tankless water heaters model mcc 91 2w 119 55 119 55.