Hot Water Heater Thermocouple Test

So the next question how to test a thermocouple with a multimeter.

Hot water heater thermocouple test.

The water heater thermocouple is a device that monitors temperatures in the water heater to determine whether it needs to heat up or turn off the heat. Measure the current by using the multimeter device set on millivolts. You know you have a problem. That will help with a furnace thermocouple test.

How to test a thermocouple. How to test a thermocouple with a multimeter. If the thermocouple is working you should be able to measure 30 to 40 millivolts of voltage at the connection end of the tube when the pilot flame is on. Discretion should be used if the reading is between 21 and 25.

You ask a friend and the friend tells you the thermocouple is bad. Anything under or hovering around the 20 millivolts mark means the thermocouple needs to be replaced. Thermocouples designed for residential gas appliances such as fireplaces water heaters and furnaces are made for 30 millivolts. In this episode of repair and replace vance shows how to replace the thermocouple in a gas water heater.

A faulty thermopile may be at fault. How do i install a new thermocouple. It is comprised of two different types of metal which react differently to heat and expand at different rates signaling to the water heater when to turn on or off. It also is good for water heater thermocouple testing.

Pilot light keeps going out. One probe of the meter should be connected to the copper sheath of the thermocouple and the other to the gas valve. When the heat hits the hot junction or tip of the. How to test a thermopile s voltage using a multimeter.

The reading should be between 25 and 30. Sometimes when you try to light the pilot it does not want to stay lit. Acceptable range for most water heat.