How To Test Electric Water Heater Thermostat With Digital Multimeter

The meter should read 0.

How to test electric water heater thermostat with digital multimeter. If your meter is analog then tune the indicator at zero while touching both pins ends. Using the multimeter connections touch the top to legs at the same time. During testing make sure that the water in the tank is not above the lukewarm level. Now let us get started with the following steps on how to test a water heater with multimeter.

The lower thermostat has only two terminals. If you have a voltage stick you can use that as well. The reading on the multimeter should be zero. Measuring continuity of an electric water heater using a digital multimeter.

Use a multimeter to determine if and how your elements are damaged. Open the water tap and let the water flow till it s cold. On left side screw terminal bring one of the black probes of your multimeter. Use the screwdriver to set the lower thermostat to the highest setting.

Leave the upper thermostat in the lowest setting and test the lower thermostat. Move to the thermostat terminals and check if it is supplied with power. If it is you will have a reading of 240v on terminals 1 and 3. Switch off the power breaker that supplies power to the water tank.

Below are the steps to follow. Touch one probe of the multimeter to each terminal on the lower thermostat. You will also need to check the water heater thermostat with digital multimeter tools. No matter the meter is digital or analog.

It s the easiest method to test your thermostat for the first scenario. Before handling anything on the thermostat use a multimeter to confirm the power is off to the water heater. If you are using a digital multimeter here then also setting the lowest ohms for resistance is your first duty. Turn off the breaker inside your main electric panel providing power to the water heater.

Set the multimeter at the lowest ohm point. Usually it is on 200 in the digital multimeter.