Hot Water Heater Thermocouple Test

Measure the current by using the multimeter device set on millivolts.

Hot water heater thermocouple test.

How do i install a new thermocouple. How to test a thermocouple for a water heater everyone who has owned a gas heater including furnaces or water heaters will know that from to time you have to light the pilot light unless you have the electronic ignition that automatically lights the pilot light. How to test a thermopile s voltage using a multimeter. Acceptable range for most water heat.

So the next question how to test a thermocouple with a multimeter. Thermocouples designed for residential gas appliances such as fireplaces water heaters and furnaces are made for 30 millivolts. When the heat hits the hot junction or tip of the. Pilot light keeps going out.

You know you have a problem. That will help with a furnace thermocouple test. One probe of the meter should be connected to the copper sheath of the thermocouple and the other to the gas valve. If the pilot light doesn t stay lit check the gas water heater thermocouple by keeping the pilot button depressed.

How to test a thermocouple with a multimeter. How to test a thermocouple. 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. 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.

In this episode of repair and replace vance shows how to replace the thermocouple in a gas water heater. It also is good for water heater thermocouple testing. 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. A faulty thermopile may be at fault.

The reading should be between 25 and 30. You ask a friend and the friend tells you the thermocouple is bad. Discretion should be used if the reading is between 21 and 25.