Should the top and bottom thermostat water heater?

4 Answers. Setting the top element slightly higher helps the elements to be used evenly. If you set them to the same temperature, the bottom element will be the first one on every time, and frequently the only one used to maintain the temperature.

How do you calibrate a thermostat on a gas water heater?

To do so, place your thermometer in a cup of iced water until the temperature dial lowers to 32 degrees, or the lowest degree on your thermometer’s gage. Calibrating the thermometer essentially resets it so that you will get an accurate temperature reading moving forward.

What should a water heater thermostat be set at?

120°F
According to the Department of Energy, a 120°F water thermostat setting is more than adequate to slow mineral buildup and corrosion in your water heater and pipes while keeping your water supply safe to use.

Can you replace the thermostat on a gas water heater?

The water heater thermostat is part of the gas valve. They cannot be replaced separately from the valve.

How do you test a thermostat in a hot water heater?

Test the lower portion of the thermostat, by touching one lead to the common terminal (next to the temperature setting) and the second lead to the left heating element terminal. If the water in the tank is below the thermostat’s set temperature, the multimeter should read close to zero ohms of resistance.

How do you test a water heater thermostat?

How does gas water heater thermostat work?

The thermostat is a thermistor that responds to heat by producing a small electric current. The current increases when water temperature increases, and drops when temperature drops. Changes in the electric current cause gas control to turn ON and OFF. When gas control turns ON, it releases gas to burner.

Can a thermostat go bad on a gas hot water heater?

Is a gas water heater thermostat something you can fix? It is usually part of the gas valve and not set up for servicing. Most of the time, interest in the thermostat is to adjust the temperature of the water in the tank. A defective thermostat will need to be replaced with the entire gas valve.

Why is there two thermostats on my water heater?

An electric storage-tank-style water heater has two thermostats because it has two heating elements. The thermostats are designed so only one element is active at a time. The reason only one element is active at a time is because it allows for smaller wire sizes and lower amperage demand when in operation.