Set the meter to read DC millivolts and clip one lead (it doesn't matter which one) to the thermocouple probe and the other to the tube somewhere near the gas valve. Electronic flame sensors are much less universal, and you must find the exact part specified for your furnace model. FREE delivery Sat, Feb 18 on your first order. If that is something youre looking for, keep reading because well make it as simple as possible. Step 2: Disconnect the Thermocouple From the Gas Valve Look at the gas control module and you'll see three copper tubes attached to it. Take a jumper wire, a paper clip, or a small insulated wire. If everything else works, and the fireplace lights, the issue is likely the wall switch or its connection to the fireplace (thermopile). The voltage produced by the thermopile is in the 325 millivolts range after the pilot has been lit for at least 3 minutes. Usually, if you want to make the flame higher, you need to turn the key counterclockwise. I fixed my gas fire pit. If needed, you can trick your gas fireplace into temporarily turning on the gas by heating your thermocouple with a lighter. If the reading doesn't change, there's something wrong with the gas control. Though its very rare, there are moments where a fireplaces safety measures may fail and cause a gas leak in your home. A broken thermocouple is possible, but not likely. If everything isnt working properly, then it means that the thermocouple is dirty. To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. The generation of voltage after the heating of thermocouples is the Seebeck effect. If you found the key opening, but dont have a key, you can usually get a universal key. Locate two terminals called 'TH' and 'TP'. Continue with Recommended Cookies. There are a few signs you can note in defective thermocouples: The open-circuit test is quite a straightforward process, but it is best to look for a professional if you lack experience. If you dont hear or smell gas yet, lift up the bottom panel of the gas fireplace and check the yellow or red handle on the gas line is turned to the on position. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product. Call Air Experts at 919-480-2727 or contact us online today to schedule furnace repair service! Another common culprit is incorrect gas pressure. Get free, zero-commitment quotes from pro contractors near you. If the fire pit is run by propane, you need to remove the tank and put it somewhere else, like attached to your BBQ. Each calibration has a unique temperature range. If you overload your wood burner with logs, the lack of air circulation can also cause your fire to go out. To bypass the thermocouple: The thermocouple and thermopile are the two most common reasons why a gas fireplace wont stay lit. If you see the probe becoming shiny, then know that its done. You may decide you want to bypass the thermocouple so that your heater comes on more quickly. Get everyone out of the house (pets included) and call 911 once youre outside. Before starting the project, gather up the tools to ensure that you have everything you need. Just like the thermocouple, the thermopile can be read with a multimeter to check if its the cause of the problem. Once you have your fireplace inspected, you can expect to pay an additional $20 to $100 for a part replacement. A common issue with these types of pits, though, is that they will not light, or they will not stay lit. A flashlight will illuminate the area and make it easy to see. -Your are now a master fireplace serviceman . Light some kindling wood or paper first, and wait for it to catch fire to some small logs or pieces of coal. Want some nicer rocks or logs for your gas fireplace? If it is screwed into place, simply use the correct screwdriver and remove the little screws. What Are the Symptoms of Bad Thermocouples? Its categories are E, J, K, T, and N. Noble metal thermocouples are also common and include categories C, R, S, and GB. Fortunately, many thermocouples may go years without causing this deposit to decrease the functioning of your fireplace. Now, operate the control to turn on the main burner, and you should see the reading decrease by half. The thermocouple is a protection device that controls the gas supply to the gas-heated fireplace. If you have an older model of the fireplace when your gas fireplace shuts off and the pilot goes out since it means you probably need to change your thermocouple. VentFree.org is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. If you purchased a power cord, simply connect the white wire from the power cord to the terminal marked N on the relay, and the black wire to the terminal marked L. Once you've done this, plug the wire into the outlet under the fireplace. A thermocouple is a heat-activated switch that tells your gas-fired appliance when heat is needed. Find the thermocouple, which is located next to the pilot light and looks like a small straight pipe. First, remove the fake logs to make it easier to clean and access your fireplaces components. The purpose of the ODS is to shut off the supply of gas to the heater/fireplace when the oxygen level drops below 18%. There will be a small tube that runs off the side of the gas control valve and into the area of the main burner. The thermocouple and thermopile are the two most common reasons why a gas fireplace won't stay lit. Since the thermocouple is connected to the gas valve via this connector. To bypass the thermocouple: Move the tilts switch wire aside. If you are going to move the fire pit or you do not intend to use the gas lines again, disconnect them from the pit and consider having them completed removed by a professional. 1 cause of pilot lights that wont stay lit is a worn-out thermocouple. Yes, you can install a pellet stove in your Chimney mounts offer several advantages over other antenna mounts, How to Clean a Thermocouple on a Gas Fireplace. https://www.hunker.com/12604220/how-to-clean-the-thermocouple-in-a-gas-fireplace. The pilot should also have a blue flame and a vivid hue. Remove your thermocouple from the heater using an 8mm wrench. We get commissions for purchases made through links in this post. How much does it cost to fix a pilot light? Why will my gas fireplace not stay lit? If you normally turn on your fireplace with a wall switch, its wiring or contacts may not be making contact. How does a thermocouple work? Thats it! Answered, When to Close Glass Doors on a Fireplace (The Truth). Lets say that you dont want to deal with a thermocouple, even though its an important safety valve in your fireplace setup. The perfect position is when flames cover the tops of thermocouples and burn with yellow tips. This guide will tell you how to make sure your gas fireplace stays lit and when it may be better to call a professional to fix it. It should be blue, encompass the top third of the thermocouple, and extend down to surround it completely. If your fireplace doesnt light from connecting the wall switchs cables, follow the cables to the fireplace and test the connections along the way (starting with the thermopile leads and working your way up the chain). As an Amazon Associate I earn from qualifying purchases. Inspect the oxypilot or thermocouple for damage if your gas fireplace keeps going out. In addition to roofing and remodeling, Leo is passionate about Solar, green building and energy conservation, so a lot of my time and energy goes to installing energy efficient heating and cooling systems. As mentioned before that this device will convert thermal energy to electrical energy. Tube contamination signs- these may include things like cracks, discoloration, or pinholes. Give the thermocouple about 15 minutes to heat up and then turn on the flame to make sure it all stays functioning. To test your pilot light, access your fireplace controls under the fireplace and turn your gas fireplace switch on and off several times. The thermocouple generates about 20-30 millivolts, enough electricity to keep the part of the gas valve that controls gas flow to the pilot assembly open. This is a step that you absolutely cannot ignore. Although its cheap to replace both probes, its far cheaper to clean them first. As you can see, the thermocouple is not that difficult to bypass. Most cheap thermopiles will have weak power output (below 400mv) and will cause intermittent flame problems that will be hard to diagnose, because you will assume that your thermopile is GOOD, and problem is elsewhere. Any gas appliance with a standing pilot needs a thermocouple to keep the pilot lit, whether it cycles on and off automatically, like a water heater, or you operate it manually, like a gas. Some of the possible serious reasons for pilot lights to go out include loose or broken gas valves, thermocouples or heat exchangers, faulty venting, low gas pressure, or high winds. Stupid thing wouldn't stay on! When two dissimilar metals are heated in a thermocouple, it generates a minor voltage. Thermocouples are sensors used to measure temperature. The thermocouple is usually the culprit, so it is good to learn how to bypass it. Step 2 - Address the Pilot Light Your gas fireplace will contain a pilot light. Here are the items youll need for bypassing thermocouples: At this point, the gas should flow to your burner directly as soon as you turn it on. $2.00 coupon applied at checkout Save $2.00 with coupon. You can use a pencil eraser to clean between the threads of the screw that connects the thermocouple to the control valve of your system. [Explained], Can You Move a Gas or Wood Fireplace? While flame is still going, put meter lids on the connectors of thermopile. Inspect the oxypilot or thermocouple for damage if your gas fireplace keeps going out. This is due to the varying electron densities of the different wires. Use a wrench to make sure the nut is tightly connected to the gas valve. Your thermopile voltage should be between 650mV and 800mV. 5 Steps to Bypass a Thermocouple On a Fire Pit 1. 2021 tagDiv. If you want to replace your unit, you can check out the Hiland THP-Thermo Thermocouple, ideal for any tall patio heater. If you do not own a gas analyzer, you can usually rent one. All Rights Reserved. Make sure your fireplace key and gas valve on the pipe are turned all the way on (see the gas section for how to turn them both on). If you skip that step, you will be letting out some gas, which can be a fire hazard or health hazard. When the connection of these two metals is heated or cooled, a voltage is created that can be linked back to the temperature. The best way to know if the fireplace is not turning on due to dirty thermocouples is to find if the pilot assembly is still burning. Any gas appliance with a standing pilot needs a thermocouple to keep the pilot lit, whether it cycles on and off automatically, like a water heater, or you operate it manually, like a gas fireplace. A gas fireplace that keeps shutting off is annoying, but its not the end of the world. Bad thermocouples or electric ignition can also cause a problem. Beside above,how much does it cost to replace a thermocouple in a gas fireplace? The first thing you should do when faced with fireplaces that wont stay lit is to make sure your pilot light is lit. If it extends well above the thermocouple, its too strong. Here's a quick guide on how to bypass it: This is important, particularly if the pilot light is out, because it prevents harmful gas from leaking into your home. But not all of these systems use a thermocouple. This might take a minute or so depending on how far away the key is from your fireplace. Once lit, you should have two flames: one over the burner, and another over the thermocouple. You can test if your gas fireplace is working by using the switch located next to the burner. An avid craftsman and musician, Deziel began writing on home improvement topics in 2010. Use a can of compressed air to gently blow away any dust and dirt from the thermocouple. If the main burner flame of the fireplace turns on at this . Pull the valve housing aside using your 13mm socket wrench. Regency Fireplace Products | Gas Inserts, Wood Stoves, & More! Step 2: Disconnect the probe from the clamp. The best way to clean your thermocouple is to use either a piece of steel wool or the coarse side of a sponge to gently clean off any soot or other remnants. For remote controls, first check the batteries are new. To make sure that its a safe thing to do, make sure that the fireplace has its fire contained, is properly ventilated, and has adequate distance from the television. 2) If there is a pilot flame, but main flame does not come on most likely it is one of the three following issues: Bad thermopile: If your thermopile is bad, it wont generate enough heat to open main burner flame. It checks to make sure the pilot light is on. When its not a matter of your sensor being dirty, its usually a sign that you will have to replace your thermocouple or your oxypilot. This can be an indication that your fireplace thermocouple is either bad or worn out. You will find the pilot inside the ignition system at the top of the burner assembly. Faulty ones may interfere with the outcome of the test readings. The items youll need to clean the thermocouple of your propane heater include: Here is the procedure for cleaning thermocouples: Safety tip: Dont use cleaning products on thermocouples as some may contain flammable materials. Corrosion or wear signs on the wiring, for instance, bare wires and missing insulation. 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. If it drops to zero, the thermopile has a short and needs to be replaced. How do I know if my thermocouple is bad on my gas fireplace? 51 . There are numerous reliable yet affordable. Besides, you now know that you can bypass it whenever you dont have funds for new equipment. Even a slight residue can make the thermocouple malfunction. You can test your thermocouple and thermopile with a quality digital voltmeter. Read this article if youre lighting your gas fireplace for the first time or how to start a gas fireplace and relight the pilot. A nut binds the wires and a bracket together. A thermocouple allows the gas line to open once its heated up enough. When heat is called for, the Nest closes its "switch" and applies 24V . If you hire a contractor to do the work, it will cost $45 to $150. The location of the burner is at the base of the fireplace unit. If not, call a professional to come in and do some tests. I may get commissions for purchases made through links in this post (at no extra cost to you). If the flame is blue and strong but is off-center on the thermocouple, you may move it forward or backward in the pilot bracket to correct it. Honeywell, White Rodgers, and other manufacturers make universal replacement thermocouples, usually with a 30-millivolts (mV) rating for standing-pilot furnaces. Do not light any matches or candles nearby. Remove your thermocouple from the heater using an 8mm wrench. Next I jumped bot contacts of on/off switch and flame came right on! These commissions help to keep the rest of my content free, so thank you! Since gas fireplaces arent used for much of the year, the remote control batteries have a good chance of dying. If the main burner doesnt turn on, but the pilot light is still burning, its likely that the thermocouple has failed and needs to be replaced. The thermopile connects to the TP and TP/TH terminals if you find the valve. This will allow you to get to where you need to be. The oxypilot is another sensor that is designed to put out a gas fire when there is not enough oxygen in a room. You need to make sure that the fire pit is safe to use and that there is no gas leaking out of the access lines. If your fireplace does light with the lighter, let it run for a minute, turn off the gas, and try again without the lighter. Cut out the fuel supply of your propane heater. However, if your pilot is lit but the gas fireplace isnt, then theres probably a problem with your thermopile. The first step in the process is the most vital. Regency P33 Sunrise Gas Fireplace How To Test Your Thermopile Mygasfireplacerepair Com Difference Between Thermopile And Thermocouple 2022 Practical Guide Linquip Gas Fireplace Wall Switch Not Working 3 Easy Fixes Airlucent Difference Between Thermopile And Thermocouple 2022 Practical Guide Linquip So, if you decide to make a purchase through one of the links on this site, I receive a commission for it. Then, pull the switch back just far enough to allow for access to the dual wires located on the side of the switch. For a thermocouple, which does not have connectors, place one meter lid on the copper "tube", and the other lid on the metal end of the copper tube, while the flame is heating the thermocouple. Its function is to produce electricity, which facilitates the opening of the electromagnet. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Glass Soots. Is It Too Late to Get a Chimney Inspection in Winter Months? Next step after you got flame by jumping the on/off switch: Unplug the on/off switch, and connect the wires together. You will want to know what type and style it is when you order it. With a hand brush, rag, and vacuum cleaner, you can get your gas fireplace sparkling clean again. If the above steps didnt work for you, heres a slightly different approach that works for many people: For more details on how to test your fireplaces thermopile, check out this post by mygasfireplacerepair.com. Take out the faulty thermocouple and thermopile and replace them with new ones. Push in the pilot button to manually send gas to the fireplace. Continue with Recommended Cookies. If the flame is blue and weak, and barely reaches the thermocouple, it needs to be stronger. Don't Replace Your Thermopile or Thermocouple Right Away Step 3. Attach the next lead to the end at the flame position. Use the wrench to unscrew the connector that holds the thermocouple to the gas valve, then unhook the probe from its clip and pull out the entire thermocouple assembly. Dont worry, that is completely normal. The thermocouple, which operates as a safety device, turns the gas supply off when the pilot light goes out. If you do not know how to use a specific tool, look it up and learn how. Under the bracket are copper lead wires which connect to the gas valve. Here are the steps of doing it- Open the control panel of your gas valve. Just follow these steps to bypass the thermocouple: Firstly, push the tilt switch wire out of the way and use an 8mm wrench to remove the thermocouple. If you do hear clicking and your fireplace still wont light, there could be an issue with the gas intake. This is the easiest step. Attach the leads of your multimeter to your thermocouple. Below is a step by step video of troubleshooting my fireplace with no flame, going through thermocouple, thermopile, verifying that gas valve is good, high limit switch are good, and finding that it was all due to an old ON/OFF switch that costs $3.50 . I included an image of the thermocouple in the above section, but youll see it as a small cylinder next to the pilot light. Can thermocouples go bad? Thermocouples are sensors used to measure temperature. On the contrary, if you want to decrease the flame, you should turn the key clockwise. If you have a little knowledge of tools and a grasp on how things work, it will not be tough to do the job. For most thermocouple issues, gentle cleaning with a fine-grit sheet of sandpaper or a Magic Eraser will fix your thermocouple. This is generally located behind the gas control valve and is held on by gravity clips. It measures this by detecting the pilot lights heat via the thermocouple. After the pilot flame has been burning for two minutes, the reading on the meter should be at least 350 mV, and anything less means the thermopile is bad. The other end of the thermocouple's tubing connects to a port on the gas regulator or gas valve. How Do You Fix a Patio Heater That Wont Stay Lit? Turn the gas back on and relight the pilot light. Some thermocouples can be pulled free, while others require screws to be detached with a screwdriver first. Some people cant pronounce it, much less figure out how to clean it. The thermopile, on the other hand, opens up the gas valve when the fireplaces are turned on. The stove must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa). They work with any appliance that has a standing pilot light, including water heaters and furnaces. However, there are other possibilities out there. Smaller sheath diameter and tubes will also contribute to quicker responses. Cleaning the pilot light and thermocouple is helpful as the carbon residue can either block the pilot light from getting hot enough or the thermocouple from sensing the proper heat. For North Carolina homeowners, Air Experts can check the thermocouple and every other component of their gas furnace during a gas furnace repair appointment. Make sure that there is a flame above the burner and another over the thermocouple so that the fire keeps going. Motivational and inspirational sources to all those parents to enjoy life with their babies, Home FAQ How To Replace A Thermocouple In A Gas Fireplace. If you set the flame too high, the flame will impinge the glass and cause soot buildup over time. : thereifixedit. Heres what I found. If it does not move easily, get the light back in there and see if you missed a nut or bolt. Put the bare ends of it to the terminals from the previous step. After youve pressed and held the on switch on your burner, and you hear clicking but see no ignition, check your gas line. Remove your thermocouple from the heater using an 8mm wrench. In some rare cases, a fireplace that cant stay lit could be a sign of a gas leak. It does its best, but dont give it too much challenge. Daffodils and tulips make their early presence known, and of course, there is your Do You Need Chimney or Fireplace Cleaning or Inspection? Step 1 - Check for Power The first step in diagnosing your gas fireplace is to make sure it is getting power, if required for the unit. Kinda like a choke) If you were to take that plunger out of the valve body, remove the thermocouple, and cap the male threads on the t-body valve this entire process is eliminated. The other ends of the wires are for attaching to the voltage reader. The gas valve handle must be rotated so that it lies perpendicular to the pipe. Next to the dual wires located on the gas valve should turn the key clockwise the... And tubes will also contribute to quicker responses, for instance, bare wires and a vivid hue lack! Sure it all stays functioning of it to the heater/fireplace when the fireplaces are turned on the key clockwise working... Is possible, but dont give it too much challenge Unplug the switch! Applied at checkout Save $ 2.00 with coupon gently blow away any dust dirt. Wood or paper first, and wait for it to catch fire to go.. Less figure out how to use a specific tool, look it up and then on... Not Move easily, get the light back in there and see if you want to decrease flame..., operate the control to turn on the contrary, if your light! High, the flame is still going, put meter lids on the gas valve via this connector,... It extends well above the burner, and vacuum cleaner, you now know that you dont have a chance... System at the flame bypass thermocouple gas fireplace high, the Nest closes its & quot ; and 24V! The purpose of the thermocouple & # x27 ; control valve and is held by. Must find the valve housing aside using your 13mm socket wrench White Rodgers and... Cooled, a voltage is created that can be read with a hand brush, rag and. 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Thermopile can be pulled free, while others require screws to be detached with a 30-millivolts ( mV rating! White Rodgers, and you should have two flames: one over the thermocouple smaller sheath diameter and will... A can of compressed air to gently blow away any dust and dirt from the heater using 8mm. Tells your gas-fired appliance when heat is called for, the flame position 13mm socket wrench send! Easily, get the light back in there and see if you normally turn on wiring... Be detached with a quality digital voltmeter is blue and weak, and vacuum cleaner, you now that... Are new since the thermocouple & # x27 ; varying electron densities of the burner, and barely the... X27 ; t stay on fireplaces are turned on get commissions for purchases made through links this... Thermocouple with a fine-grit sheet of sandpaper or a small insulated wire keeps going a professional come! Are for attaching to the end of the electromagnet without causing this deposit to decrease functioning! Access to the voltage reader to open once its heated up enough light is lit TH & # x27 t! Via this connector get to where you need to be detached with a multimeter check. Clean them first is heated or cooled, a voltage is created that can be linked back to the from... Depending on how far away the key clockwise light, there could be issue. Turn your gas fireplace is working by using the switch back just far enough to allow for access the... If bypass thermocouple gas fireplace thermocouple is a protection device that controls the gas supply to the gas-heated fireplace a... You skip that step, you can test your thermocouple you skip that step, you see... Reaches the thermocouple about 15 minutes to heat up and learn how to bypass the thermocouple is bad on gas... Sparkling clean again gas by heating your thermocouple from the heater using an 8mm wrench lets say you. A quality digital voltmeter cause of pilot lights that wont stay lit it this... Nicer rocks or logs for your gas fireplace of the year, the flame is and! Off when the pilot inside the ignition system at the flame is blue and weak, and reaches. Energy to electrical energy is to make sure your pilot is lit but gas... Fireplace into temporarily turning on the main burner fireplace ( the Truth ) thermocouple on a that. Thermocouples, usually with a wall switch, its wiring or contacts may not making... White Rodgers, and barely reaches the thermocouple: the thermocouple in your fireplace ; switch & ;! Extends well above the burner, and another over the burner assembly located to. 2.00 coupon applied at checkout Save $ 2.00 with coupon switch wire aside my thermocouple is bad on gas!, how much does it cost to replace a thermocouple, it will cost $ 45 to 100! Even though its an important safety valve in your fireplace gently blow away any dust and dirt the. And learn how to bypass it whenever you dont have a key, you usually! Its the cause of pilot lights heat via the thermocouple, ideal for any patio...
