Why are there two thermostats on a hot water heater?
A dual-element water heater uses two heating elements controlled by two separate thermostats.
When it reaches a specified temperature, it shuts off, and the lower heating element takes over, heating the rest of the water.
This is an efficient, money-saving feature, as the water is heated in a consistent manner..
Are all hot water heater thermostats the same?
There are more than 50 brands of residential tank type electric water heaters in the U.S., most thermostats are interchangeable, however, read the product description carefully. If you must replace a thermostat its always a good idea to replace both thermostats at the same time.
How do you know when your water heater needs replacing?
5 Signs You Need a New Water HeaterAn Old Unit. If your water heater is older, you can find its exact age by looking for the serial number on the manufacturer’s sticker near its top. … Rusty Water. If your hot water is rusty, your water heater could be rusting on the inside, and it might start leaking soon. … Not Enough Hot Water. … Rumbling and Noise. … Leaks.
How much does it cost to replace a water heater thermostat?
The average thermostat replacement cost is between $100 and $300. Most other repairs are equally affordable. There are two main types: gas and electric. A gas unit works by way of a gas flame while an electric one works using electric elements, or coils.
How many thermostats are in a hot water heater?
two thermostatsEach electric water heater has two thermostats, one for each element. If one of the thermostats fails to work, the water will not heat as efficiently. Typically, the lower thermostat handles most of your water heating requirements. When you need higher amounts of hot water, the upper unit kicks in.