Question: How Does A Two Element Electric Hot Water Heater Work?

What is a double element water heater?

A dual element water heater is a two thermostat system, an upper and lower, that heats water in its tank one element at a time.

Only one heating element will be active at any one time.

Water is more evenly heated in this system, which is now the most common in homes built today..

How long does a heating element last in a water heater?

6 to 10 yearsReplacing a Hot Water Heater Element Water heaters typically have a life span of 6 to 10 years, so if your heater is older, you can expect that it’ll be experiencing problems sooner than later.

Why do electric water heaters have two elements?

A dual-element water heater uses two heating elements controlled by two separate thermostats. The upper element heats the upper portion of the water column. When it reaches a specified temperature, it shuts off, and the lower heating element takes over, heating the rest of the water.

Should both thermostats on water heater be set the same?

To ensure your electric water heater works as efficiently as possible, you should set both of the thermostats at the same temperature. … If your water heater has two thermostats, adjust both the same amount. The top thermostat should be a few degrees higher than the bottom.

How much does a heating element for a hot water heater cost?

Heater Element Replacement Cost The typical professional charge to repair your heating elements is $200 to $300. There are two of these in each unit, one at the top and one at the bottom. The top element controls the bottom element and, if it goes bad, your unit won’t be able to generate hot water.

Do both elements come on in an electric water heater?

The basic operation of a two thermostat system (upper and lower) on an electric water heater of 240 volt supply is as follows: Only one element will come on at any one time. … Once that temperature has been reached, the thermostat will then flip power down to the lower thermostat.

Which element heats up first on electric water heater?

Starting with a cold tank, upper thermostat turns on upper element until top 2/3 of tank reaches temperature setting. After top of tank is heated, upper thermostat turns-off upper element and sends power to lower thermostat which turns on lower element.

Should both thermostats on water heater?

The majority of electric water heaters have two thermostats: an upper and a lower, located under two control panels. To ensure your electric water heater works as efficiently as possible, you should set both of the thermostats at the same temperature.

What causes a hot water element to burn out?

The most common cause of burned out elements on new water heater installations or new element replacements is DRYFIRE. This happens because the installer fails to open a hot water faucet while the heater tank is filling with water and therefore purging or bleeding air from the system.