Testing Water Heater Thermostat With Multimeter

Touch one probe of the multimeter to each terminal on the lower thermostat.

Testing water heater thermostat with multimeter. Detach the wiring access with a screwdriver at the top of the heater. Open the water tap and let the water flow till it s cold. Unless it happens the thermostat has defected. Switch off the power breaker that supplies power to the water tank.

If your multimeter points near zero then the thermostat is okay. During testing make sure that the water in the tank is not. If the water is cold the multimeter will point near zero. If the multimeter needle moves the heater element is grounded and it must be replaced.

The lower thermostat has only two terminals. All you need is some tools screwdriver and multi meter etc. So how to test water heater thermostat. Start safe by turning the power off.

Touch the other probe to any metal part of the water heater. How to test water heater thermostat using simple tools available at home. You don t need professional skills for this. The tools you ll need.

If it is you will have a reading of 240v on terminals 1 and 3. Use the screwdriver to set the lower thermostat to the highest setting. Connect the multimeter pin ends on point c d as shown in the picture below. Get to your circuit board wherever it is in your house.

It s very easy to test and replace the faulty thermostat of your water heater. Now let us get started with the following steps on how to test a water heater with multimeter. Leave the upper thermostat in the lowest setting and test the lower thermostat. Below are the steps to follow.

And basic knowledge of the replacement. You just have to be a little careful to avoid any kind of accident. You need to turn off the. Move to the thermostat terminals and check if it is supplied with power.

Connect the multimeter pin ends on point 1 2 as shown in the picture below.