If you get dust in the pilot assembly and the pilot needs to be cleaned out, it produces a “lazy” flame, which will be disturbed by the draught of the main burners. The flame lifts away from the thermocouple and causes the temperature on the tip of the thermocouple to drop. This, in turn, makes the gas valve shut off.
How to Clean the Thermocouple in a Gas Fireplace
- Turn off the fireplace gas valve and remove the front panel from the fireplace.
- Find the thermocouple, which is located next to the pilot light and looks like a small straight pipe.
- Use a can of compressed air to gently blow away any dust and dirt from the thermocouple.
how do you test a thermocouple? Steps
- Locate the pilot light controls on the gas valve.
- Turn the pilot light on for 30 seconds.
- Release the button to see if the pilot light goes out.
- Turn off the gas supply to test the thermocouple again.
- Count to 20 and wait for the pilot light to go out.
- Listen for clicking near the gas valve.
Also, how do you know if you have a bad thermocouple?
If you can‘t get the flame to light at all, and you‘re sure the gas is on, there’s probably an obstruction in the pilot tube. If the flame lights and goes out when you release the gas control knob after holding it in for the recommended 20 to 30 seconds, that’s the sign of a thermocouple malfunction.
What does a thermocouple look like?
The thermocouple looks like a piece of metal tubing smaller than a soda straw. To find it, first locate the gas control box. This is the box that the main gas line enters, where you turn the gas on in the furnace. The other end of the thermocouple sits in the flame of the pilot light.
What does a thermocouple look like on a gas fireplace?
The thermocouple on your gas fireplace is a heat-sensitive device that keeps the pilot gas tube open while the pilot is lit. The thermopile is a related device that you should test at the same time — its function is to open the gas to the burners.
Can you clean a thermocouple?
If the Thermocouple is faulty it will cause the unit to shut down. How to clean? Remove Thermocouple from pilot assembly, using steel wool or emery cloth to lightly clean the tip removing any soot or build up that might have accorded due to an improper pilot flame.
How do you fix a thermocouple?
A burned out or broken thermocouple should be replaced. To replace a thermocouple: Step 1: Unscrew the copper lead and the connection nut inside the threaded connection to the gas line. Step 2: Under the mounting bracket at the thermocouple tube, unscrew the bracket nut that holds the tube in place.
Are thermocouples universal?
Universal Thermocouples. Universal thermocouples, as the name implies work on most water heaters. They are available online and in home supply stores for a reasonable cost. The length and the thread type are the two concerns when purchasing one.
What is a thermocouple on a gas fire pit?
A thermocouple is an intricate safety device for your indoor fireplace. The thermocouple detects whether or not your fireplaces pilot light is lit using the heat from the flame, converting it to an electronic signal (voltage) and sending it to the gas valve. This signal tells the gas valve that the pilot light is lit.
Why does my thermocouple keeps burning out?
1) Faulty Thermocouple. If your pilot light won’t stay lit, the thermocouple is very likely the culprit. The thermocouple is the copper rod the pilot flame directly hits. Sometimes it’s referred to as the “flame sensor.” It’s a safety mechanism that shuts the gas off should the pilot go out.
How do I light my gas fire pit?
How to Light a Gas Fire Pit Press in the piezoelectric starter button; it’s usually red, and it’s next to the control knob. Push in the control knob and turn it to the “On” position while you keep the spark generator button depressed. Continue depressing the knob for 30 to 45 seconds to give the thermocouple time to warm up.
How do you remove a thermocouple?
Replacing a Thermocouple Shut off the gas and electrical power to the furnace. Remove the furnace’s access cover. If the furnace has been running, wait 30 minutes for the thermocouple to cool completely. Unscrew the nut that holds the thermocouple end fitting into the gas control valve, using an open-end wrench.
Where is a thermocouple used?
Applications include temperature measurement for kilns, gas turbine exhaust, diesel engines, and other industrial processes. Thermocouples are also used in homes, offices and businesses as the temperature sensors in thermostats, and also as flame sensors in safety devices for gas-powered appliances.
Does Home Depot sell thermocouple?
Thermocouple/Thermopile – The Home Depot.
What does a thermocouple do?
A thermocouple is a safety device that’s used to detect whether or not your furnace’s pilot light is lit. It contains a metal rod that is placed very close to your pilot light’s flame. This rod is connected to your furnace’s gas valve.