Hot Water Heater Thermocouple Test

One probe of the meter should be connected to the copper sheath of the thermocouple and the other to the gas valve.

Hot water heater thermocouple test. How to test a thermopile s voltage using 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. How to test a thermocouple.

How do i install a new thermocouple. That will help with a furnace 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. 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.

You know you have a problem. 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. Sometimes when you try to light the pilot it does not want to stay lit. How to test a thermocouple with a multimeter.

Pilot light keeps going out. If the pilot light doesn t stay lit check the gas water heater thermocouple by keeping the pilot button depressed. So the next question how to test a thermocouple with a multimeter. 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 also is good for water heater thermocouple testing. You ask a friend and the friend tells you the thermocouple is bad. 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. Measure the current by using the multimeter device set on millivolts.

A faulty thermopile may be at fault. Discretion should be used if the reading is between 21 and 25. Acceptable range for most water heat.