Furnace Thermocouple Test

The concentric design of the isotech 877 thermocouple calibration furnace avoids the large temperature gradients present in simple tube furnaces.

Furnace thermocouple test.

The gas furnace thermocouple is an essential part of the gas boiler it is 2 metal pieces that are joined at a junction which is used to monitor the temperature of the pilot flame. If you test the thermocouple with the multimeter and you get a reading above 25 then you have another issue. The reading should be between 25 and 30. A thermocouple is a safety device that helps control the gas supply in gas heated furnaces.

What does a thermocouple look like and how do you find it. Discretion should be used if the reading is between 21 and 25. You will need a wrench multi meter and a flame source like a candle or a lighter to perform the test. High temperature k type thermocouple sensor ceramic kiln furnace with connector plate and hook up cable 2372f 1300c cr 06 4 3 out of 5 stars 45 32 99 32.

How to inspect your furnace s thermocouple. You can test it with a multimeter. This monitoring is necessary because the heat of the pilot flame sends the necessary voltage to open the valve to turn the furnace on. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple.

For a basic test attempt to turn on the pilot light again. A furnace thermocouple is a device on a standing pilot gas furnace that s responsible for opening and closing the main gas line to your home s heating system. Your furnace s thermocouple is usually located right in the flame of the furnace s pilot light. Anything under or hovering around the 20 millivolts mark means the thermocouple needs to be replaced.

Importantly always make sure the tip of the thermocouple is directly in the pilot flame. Thermocouples designed for residential gas appliances such as fireplaces water heaters and furnaces are made for 30 millivolts. Saturn model 877 thermocouple calibration furnace to 1300 c product details. When it stops working the furnace s pilot light also turns off.

A slim rod shaped flame sensor sits in the path of your pilot flame where it collects and then transfers heat down via a flexible connector wire or tube to signal through an electrical charge that the main gas valve should open. If you re still unsure or don t have a working pilot light test the thermocouple with a multimeter. This device generates a small electric signal to keep the gas valve open when the pilot is on.