Hot Water Heater Thermocouple Test

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.

Hot water heater thermocouple test.

Pilot light keeps going out. 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. How to test a thermocouple with a multimeter. It also is good for water heater thermocouple testing.

A gas water heater in boise baton rouge buffalo or boston uses a thermocouple that includes a probe attached to a copper tube that screws into a port on the gas valve. If the pilot light doesn t stay lit check the gas water heater thermocouple by keeping the pilot button depressed. Discretion should be used if the reading is between 21 and 25. 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.

The reading should be between 25 and 30. How to test a thermopile s voltage using a multimeter. In this episode of repair and replace vance shows how to replace the thermocouple in a gas water heater. That will help with a furnace thermocouple test.

When the heat hits the hot junction or tip of the. 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. One probe of the meter should be connected to the copper sheath of the thermocouple and the other to the gas valve. Anything under or hovering around the 20 millivolts mark means the thermocouple needs to be replaced.

You know you have a problem. Thermocouples designed for residential gas appliances such as fireplaces water heaters and furnaces are made for 30 millivolts. Acceptable range for most water heat. Sometimes when you try to light the pilot it does not want to stay lit.

How to test a thermocouple. So the next question how to test a thermocouple with a multimeter. Measure the current by using the multimeter device set on millivolts.