Hot Water Heater Thermocouple Test

In this episode of repair and replace vance shows how to replace the thermocouple in a gas water heater. 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. The reading should be between 25 and 30.

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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 thermocouple. Acceptable range for most water heat. Pilot light keeps going out. How to test a thermocouple with a multimeter.

If the pilot light doesn t stay lit check the gas water heater thermocouple by keeping the pilot button depressed. That will help with a furnace thermocouple test. 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.

Measure the current by using the multimeter device set on millivolts. It also is good for water heater thermocouple testing. Discretion should be used if the reading is between 21 and 25. You know you have a problem.

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 ask a friend and the friend tells you the thermocouple is bad. How do i install a new thermocouple. When the heat hits the hot junction or tip of the.

Sometimes when you try to light the pilot it does not want to stay lit. How to test a thermopile s voltage using 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. 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.

Anything under or hovering around the 20 millivolts mark means the thermocouple needs to be replaced. 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. A faulty thermopile may be at fault.

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