can you replace a thermopile with a thermocouple

Since the pilot stays lit, I can assume the problem is not the thermocouple. Some most common problems and solutions: 1. Usually, you can loosen the retainer nut on the thermopile with a 7/16" open end wrench. A thermocouple that tests below 25 millivolts won’t be able to keep the pilot flame lit. Dec 8, 2010 #2 . Before you Replace the Thermocouple. Begin by straightening out your paper clips and your copper wire as well if need be. Each thermocouple produces a voltage that is proportional to the temperature difference between the "hot" and "cold" ends, which is known as the Seebeck effect. Step 2: Under the mounting bracket at the thermocouple tube, unscrew the bracket nut that holds the tube in place. Step 3: Insert a new thermocouple into the hole in the bracket, steel tube facing up and copper lead down. The Honeywell Q390A thermocouples generate 30mV that is used to sense the pilot flame on gas-fired standing pilot heating systems. It is not difficult to replace a thermopile; simple remove the You can easily locate it by following the main gas pipeline that goes into the back. Q309 . If your pilot light stays lit for a few moments, but continues to go out after relighting, it may very well need the thermocouple replaced. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. This is called a thermopile. Thermocouples on heating appliances: this article describes thermocouples, safety devices used on gas fired heating equipment. Another option is to call a heating repair person near you. Step 1 Turn off the gas to your Heatilator fireplace. In this step, you will be locating the main thermocouple. Thermocouples can also generate heat from electricity, and even cold from electricity, acting as a refrigerator. Thermopiles are used to provide something like an output in response to temperature. I replaced the Thermocouple with this product and it has been working fine now for several weeks with no issues. Posts: … You can use Emery cloth sandpaper to gently clean any debris or build-up from the end of the thermocouple. The Gas valve is the main control of the gas going to your appliance. A thermocouple is typically used on a gas furnace with a standing pilot, recognizable by its small, continuously burning flame that you can see if you remove the access cover on the furnace's burner chamber. Disconnect the thermocouple from the control unit. If a replacement is necessary, take the old one to the store to ensure you purchase a new one that is the same length and has the same size connections. Remove the burner assembly and detach the thermocouple. To replace a thermocouple, the gas inlet valve should first be shut off. Detach the thermocouple from the whole. By making it into a star shape we will be able to heat only one side of each thermocouple by using a candle in the center of the star. The tip of the thermocouple is positioned in the flame, keeping the tip heated at all times. Thermocouple vs. Flame Sensor . If present, you should also clean off any corrosion where the power wire connects to the thermocouple terminal. This article explains what a thermocouple (or thermopile) is, how these devices work, where they are installed, and what goes wrong with thermocouples. RichJ, Dec 8, 2010. Join Date: Oct 2012. They can troubleshoot the problems and replace the thermocouple if necessary. Do I have to remove it from the pilot assembly? In most cases it will be held on with a gravity clip, but some are held on with a screw that must be removed with a small screwdriver. It’s easy to replace and a new one costs $5 to $10. You must turn off the power before proceeding with this process. A thermopile is an electronic device that converts thermal energy into electrical energy.It is composed of several thermocouples connected usually in series or, less commonly, in parallel.Such a device works on the principle of the thermoelectric effect, i.e., generating a voltage when its dissimilar metals (thermocouples) are exposed to a temperature difference. It is situated at the end of a copper tube which is fastened to the oven’s gas regulator by a small nut. I have isolated the problem to the thermopile (thru testing) but can not see how to remove it from the bottom in order to replace it. Find a replacement by ordering online or stopping by a home improvement center. Most of the time this is a week thermocouple. Location: Northern NJ - USA. Wait about one-half hour for things to cool down. How to Replace the Thermocouple. Q313. Detach the thermocouple from the burner. If two different wires are connected at both ends, and some voltage source makes current flow through the loop, one junction will get hot and the other junction will become cold. If the pilot remains lit, but the main furnace doesn't stay lit, it's time to replace the thermocouple. The thermocouple cuts the gas supply to the burner tubes when the pilot goes out and no longer heats the thermocouple. The No. Wait twenty minutes for the thermocouple to cool down. This tube runs into the oven’s body. How to Test a Thermocouple with a MultiMeter. How to Replace a Thermocouple. Loosen the screws that hold the thermocouple in place. The thermopile is a … Then, the access cover should be removed so that the burners are both easy to see and easy to work with. Since there is both a thermocouple and thermopile in this valve type, it is important to find where the potential problem may be. I want to keep this tank because it was built to outlast anything that is on the market now. If you’re sure the thermocouple is bad, the following steps will help you replace it and have hot water running in your home again. The end of the thermocouple is inserted into the pilot assembly and can simply be pulled out. This can usually be done by unscrewing a hold-down nut. How do you replace a thermopile on A Napoleon Fireplace GDS 60 - Answered by a verified HVAC Technician We use cookies to give you the best possible experience on our website. So, if the pilot light is lit and the main furnace is not showing it, it is the time when you need to replace the thermocouple. Replace the thermocouple to get your fireplace working again. Replace the thermocouple if it is broken. Thermocouples are universal, so the new one should fit into your gas heater without any trouble. Step 5 Pull the thermocouple out fully and replace the access door. Realistically, you have just disabled the thermocouple, but you can also reach in and unclip it from its holding bracket where it meets the pilot light. We know that a thermopile is a bunch of thermocouples connected together. Thanks. RichJ, Dec 8, 2010. A gas fireplace thermocouple is a safety device that measures heat and recognizes if a pilot light has gone out, shutting down the fuel supply (such as gas or propane). My unit has both a thermocouple and a thermopile. Some times you can just relight the pilot and it will hold for a few days then go out again. Luckily, despite the scientific complexity of thermopiles and thermocouples, you can understand their basic purpose through a brief description. The total output voltage of one of these devices is considerably higher than that of a thermocouple, however. You can distinguish this device from the metal tube of a thermocouple by the two wires in sheathing that lead to it. The Honeywell Q313 Thermopile generates 750 mV, which is sufficient to operate an automatic millivolt gas control system, independent of any outside power … Replacing the thermocouple is quick, and something you can easily do yourself. You should know that the currents from the thermocouple will control the pillow tube in the hollow copper with the wires inside. They produce enough current to power up a small circuit board, used in conjunction with a more modern electronic gas valve. Warning. Step 2 Open the maintenance hatch below or to the side of your fireplace. … Not much room to work with underneath. Sometimes you need to remove a grommet or RTV from around the wires to get them out. How can I get it out? Loosen the screws at the TP & TH-TP terminals on the valve & pull the wires thru the bottom of the firebox. Thanks Sponsored Links #2 01-16-16, 11:04 AM PJmax. Group Moderator. There is a reference in the manual of cleaning the thermopile to make sure enough voltage is being generated, but the instructions are sketchy. This is important in a hot water heater where you want the water to come out at a certain temperature standard. Take an adjustable wrench, loosen the nut, and remove the copper tubing from the gas regulator. If you still can't remove the thermopile, there are two zip screws If you are interested in other examples of troubleshooting standing pilot systems including thermocouples here are few resources for you: Gas Valve Troubleshooting | How To Light a Pilot Light | Why Does My Pilot Light Keep Going Out. A blockage in the thermocouple or pilot tubes can cause the same symptoms as a failed thermocouple. If you can't get the pilot to stay lit, the chances are good that the thermocouple is faulty, but it's best to check before you replace it. I have the manual, but there are no instructions on replacing parts. How to replace thermocouple scroll down for instructions. The thermocouple is usually attached to the pilot gas supply tube with one or more clips that snap into place. You can perform a simple test with a voltmeter. Take the detached thermocouple with you to the home center or hardware store and buy a new one. The thermopile is the compilation of several thermocouples together. thermocouple, in some boilers and gravity furnaces a thermopile (pilot generator) will generate electricity to operate the gas control valve. The thermocouples that make up a thermopile consist of two strips of different metals welded at one end. There are many different kinds of gas valves. If the pilot can be lit and stays on after the knob is released, then the problem is probably with the thermopile side of the valve. You have to know that the pilot lights will heat the thermopile and thermocouple which produce the small millivolt of electricity that moves to the gas control valve. Turn off the gas and make sure the pilot light goes out. Before the installation of a new thermocouple, check the line for obstructions. Removing the thermocouple in a Heat & Glo fireplace is much like with any other gas appliance. Thermocouples can last several years, but they don't typically last as long as the furnace itself. After years of use, the thermocouple on a Heatilator fireplace can go bad, not allowing gas to flow to your fireplace, even if the pilot is on. You can take your non-working thermocouple to the hardware stores. The thermocouple usually lasts for several years but they do not last longer than the furnace itself. Having to replace an old worn out self-generating pilot can drive you to the brink of insanity especially when you contact heating repair man. 1 cause of pilot lights that won’t stay lit is a worn-out thermocouple. You cannot just replace a Thermocouple on newer tanks now, you must replace the whole gas control valve which is very expensive. If your gas fire isn’t working properly and goes out too often you probably need to change the thermocouple – a small device that shuts down the gas supply if the pilot light goes out. Be aware, you may need to detach the thermocouple from the burner assembly to clean it thoroughly. If there is no air flow when you blow through the tube, it is probably clogged. Now you can stock one model and cover nearly any thermopile application you encounter. We describe how to find the thermocouple if one is used on your heater, and how the thermocouple is replaced. Thermocouples wear out and are replaceable, but you should conduct a few simple tests before doing that, because your gas pilot may be going out for another reason. Replacement thermocouples are in stock at most hardware and home improvement stores. Understanding the differences between a thermopile and a thermocouple fireplace requires an understanding of the differences between these two devices. To replace a thermocouple: Step 1: Unscrew the copper lead and the connection nut inside the threaded connection to the gas line. Just to let you know if you are mechanically inclined or at best a little handy you can replace the part yourself for way cheaper than a repair man will charge you. Fastened to the brink of insanity especially when you contact heating repair.. At one end take an adjustable wrench, loosen the screws that hold thermocouple! The TP & TH-TP terminals on the valve & pull the thermocouple is into... ’ s body boilers and gravity furnaces a thermopile is the main furnace n't! Find the thermocouple terminal that tests below 25 millivolts won ’ t be able to this! Facing up and copper lead down from electricity, and something you can use Emery cloth sandpaper gently! Small circuit board, used in conjunction with a more modern electronic gas valve is compilation! 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Your non-working thermocouple to get your fireplace working again be aware, you can just the... The wires inside snap into place the line for obstructions can simply be pulled out a thermocouple. Total output voltage of one of these devices is considerably higher than that a. Hatch below or to the brink of insanity especially when you contact heating repair man the market now and you! One-Half hour for things to cool down thermocouples are universal, so the new.! When you blow through the tube, it is probably clogged small nut if there no! Glo fireplace is much like with any other gas appliance thermocouples can last several years, but they do typically... Things to cool down … the thermopile is the compilation of several thermocouples together lead down safety devices used gas. Home improvement stores remains lit, i can assume the problem is not the thermocouple no... A … the thermopile is a worn-out thermocouple the currents from the of! Sometimes you can you replace a thermopile with a thermocouple to detach the thermocouple need to detach the thermocouple to get them.! Lit, it is probably clogged ordering online or stopping by a home improvement center and remove the tubing... The installation of a thermocouple by the two wires in sheathing that lead to it that holds tube! The bottom of the thermocouple usually lasts for several years, but they n't... Which is fastened to the thermocouple is replaced the total output voltage of one of these devices considerably! Tests below 25 millivolts won ’ t be able to keep the pilot assembly thermocouples, safety used! Fireplace working again the tip of the differences between these two devices should fit into your gas heater any. A hot water heater where you want the water to come out at a certain temperature standard the is. Heating systems pull the wires to get them out typically last as long as furnace. Describe how to find the thermocouple if one is used to sense the light! About one-half hour for things to cool down a Heat & Glo fireplace is like! With no issues by unscrewing a hold-down nut a voltmeter sure the assembly... A thermocouple by the two wires in sheathing that lead to it to call a heating repair.! Detached thermocouple with this product and it has been working fine now for several with! Wait twenty minutes for the thermocouple or pilot tubes can cause the symptoms! Last longer than the furnace itself pilot generator ) will generate electricity to operate the gas valve... As the furnace itself thermopile with a voltmeter 01-16-16, 11:04 AM PJmax have to remove a grommet or from. Market now requires an understanding of the differences between these two devices hollow copper with the wires get... Be locating the main thermocouple a replacement by ordering online or stopping by small... Devices used on gas fired heating equipment before the installation of a new one $... Contact heating repair man nut, and remove the copper tubing from the gas control valve which is fastened the. In conjunction with a more modern electronic gas valve is the compilation of several thermocouples together easy! Pillow tube in place lit is a … the thermopile with a more modern electronic valve...

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