Trying an immediate restart only igniter worked after about 4 or 5 minutes was able to light the pilot. It senses if flame is present or not. When it’s bent to a certain extent away from the pilot light, it’s no longer functional because it won’t be able to detect the heat. Does the pilot go out when you are trying to light it and you release the pilot light button on the gas valve? Before taking … You’re still reading so I guess there was no “voila” for you. First, remove the glass assembly from your Heat & Glo unit. Again, please don’t … Did André Bloch or any other mathematician receive the Becquerel Prize? I changed the thermocouple yestarday and its still going out ... keeps going out even after new thermocouple.? It really can be as simple as checking your pilot light and turning it on. This can happen on excessively windy days or nights. Edit 2: Fortunately, only a small number of problems will cause the water heater pilot light to either fail to light or keep going out. To fix this issue, you will need to replace the device or have it professionally repaired. This can happen with age. A thermocouple is a small probe that extends into the pilot light’s flame. Before jumping to the conclusion that the thermocouple is at fault, look at the pilot flame. Now i can manually light the pilot light but the gas-on button … Water heater pilot light always goes out during the night, Pilot won't stay lit after replacing thermocouple. I have cleaned the thermocouple and the thermopile, but that did not fix the problem. Read on to find out why your gas fireplace goes out after a few minutes, ... light up the pilot. A functioning pilot light should appear blue in color, which can help you determine whether or not your pilot light is working. Gas Heater Pilot Light Keeps Going Out Pilot light continues to go out even after changing the thermocouple. After about 30 seconds, heat from the ignited pilot light flame activates a simple electrical switch called a thermocouple which ensures that the gas supply to the pilot stays … Next, try replacing the thermopile and thermocouple if they seem damaged. The cause for most pilot light issues is a thermocouple in need of replacing. It consists of a heat sensor connected to a solenoid; when the sensor is not heated by the pilot flame, the solenoid closes the gas supply line. No hot water on a cold Monday morning. That’s important because gas is always being supplied to the pilot to keep the flame lit. In this case, likely you have a broken thermocouple in your gas furnace if not then the indicator itself has died. Works for a while then goes out again. rev 2021.2.8.38512, The best answers are voted up and rise to the top, Home Improvement Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. Sounds like you have a faulty spill switch rather than thermocouple. My pilot flame lights but it goes out after trying to turn it on. Thank you in advance . Gas water heaters generally use the same ones as gas fireplaces. The thermocouple is the heat-sensitive safety device that prevents the release of unburned gas. I tried re-igniting it and the pilot wont even come on anymore. Unscrew the nut that holds the thermocouple end fitting into the gas control valve, using an open-end wrench. If a spell has an instantaneous duration, but an effect that lingers, can that effect be stacked? If you have tried new thermocouples then one other possible problem is the gas valve itself. Make sure to follow the directions on your water heater label. If the pilot light goes out, the thermocouple senses a loss of heat and the rod covers the gas valve cutting off the fuel supply. The client said they had no hot water so after a quick inspection I found what the problem was. But, there’s good news. It only takes a minute to sign up. The clicking comes from the spot where the gas supply pipe meets the gas valve box. I have also seen strange things with rain getting in, like burner holes plugged with mineral deposits right near the pilot so as to cause small explosive ignition when the gas valve opens, due to delayed ignition, which blows out the pilot. I've replaced the thermocouple and it's doing the same thing. A thermocouple is a function on your water heater that senses the heat on the pilot light and allows gas to flow to the burner. My water heater pilot turns off after about an hour. I have seen the op's answer several times that's why we put drip legs on gas supply lines but, would have thought Jimmy fix-it comment was the same as I was thinking+, Pilot in gas water heater still goes out after replacing thermocouple, Visual design changes to the review queues, Opt-in alpha test for a new Stacks editor. (817) 200-4703, © 2021 All Masters Plumbing. After continuous issues with the pilot light going out, the ignitor button eventually stopped working completely, we enquired to get it fixed and were told it would be almost cheaper to replace the unit than have 1 button repaired. With the gas flow shut off, the pilot light has to fade. We hads a problem 6-8 years back ( we were pulling our hair out till Peerless put out a tech bulletin on it. I reinstalled the pilot and cleaned out the burner and related assemblies and the pilot was only going out in the morning. If the pilot light is not aimed correctly, simply bend the thermocouple to line it up with the pilot tube. thermocouple was replaced on my air furnace - Bruce 11/17/12. Water Heater Pilot Light Keeps Going Out? The thermocouple, which operates as a safety device, turns the gas supply off when the pilot light goes out. If your pilot doesn’t re-light, won’t stay lit or keeps going out after a short time, you most likely have an issue with the hot water heater thermocouple. Another reason why your pilot may be unlit may be as a result of a broken thermocouple. The water heater was working really well with no issues before this happened. A bad thermocouple will shut off gas to both the pilot and the burner, which is when people notice that the water heater pilot light is out. Give your water heater time to warm up. Why does my hot water heater flame and pilot go out? When a thermocouple fails, the pilot light won't stay lighted. How to Troubleshoot Gas Wall Heaters. Water Heater Pilot Light Keeps Going Out? So what’s the deal? Edit: Customer reply replied 8 years ago. This can happen with age. Another possible reason may be that there is a back-draft down the flue, which could also … How much does it cost to replace a thermocouple? Ask Your Own Plumbing Question . 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. If the pilot will lit but goes out after it reaches the temperature, it is the control valve. A thermocouple is a safety device and is a component of the ignition system. I lighted the pilot and it appeared to work fine. |. On the contrary, it usually develops with many older water heaters. Is it unethical to accidentally benefit from online material in a take-home exam? What happens when you reduce stock all the way? The guys from my gas distributor pumped all the water out of the pipes and it's been fine since. 5 Questions to Ask A Plumbing Contractor Before Signing the Contract. The glass piece stays in place with springs and pops out by putting pressure downward and removing it. I hold the button down in excess of 3 minutes and as soon as you release, the pilot light goes out immediatly. But, sometimes, thermocouples wear out, then you may need replacing. 1 cause of pilot lights that won’t stay lit is a worn-out thermocouple. The first thing … the burner ignites and blower comes on i can watch the burner go out after just 3 or 4 minutes then the pilot light is out again after 3 or 4 more minutes blower comes back on but burner or pilot is not lit. Thus, the thermocouple will turn off the patio heater as it tricks the gas value in to thinking that the pilot light is out. This can happen with age. How to Troubleshoot Gas Wall Heaters. Appears to be no disruption of the supply of gas. I have replaced the thermocouple to no avail. Bruce, Check for these other causes of loss of the gas pilot flame . The pilot light needs a strong flow of gas to make a strong, steady blue flame that the thermocouple can sense. This is happening with increasing frequency. If it does not light attempt light process with a bbq lighter or external heat source going into the peephole instead of ignitor. Thermocouple problems can be fairly common, and this component is often the culprit when the water heater pilot keeps going out. But if the pilot flame goes out, then the gas would still be released. For correct identification procedures check out this Tech Talk post. This morning (Monday) the pilot was out again and I relighted it. Is there an intact weather cap on the vent pipe? Why does my gas heater keep shutting off? The below video will demonstrate how to light your water heater pilot light. When your thermocouple detects an unlit pilot, it automatically shuts off the gas to your water heater as a safety precaution. If it appears small and has an orange-yellow tinge, it may be too weak to heat the thermocouple. thermocouple was replaced on my air furnace - Bruce 11/17/12. Calibration types for thermocouples are specified by the American Society for Testing and Materials(ASTM) according to their temperature versus EMF characteristics in accordance with ITS-90,in standard or special tolerances. … Then detach the thermocouple from the burner and take it with you to the home center or … So if a pilot light won’t stay lit, you’ll want to find out what’s causing the problem right away. Again, the usual culprit with a faulty pilot light is the thermocouple. This is an easy fix. This device is designed to pick up an electrical signal from the pilot light’s heat to determine whether or not the pilot is on. It has a thin metal wire that runs back to the gas valve. pilot light keeps going out on furnace i've replaced the thermocouple 2x's any ideas? Listen for clicking near the gas valve. Short question Short answer = replace thermostat Mr. Heater Mr... | Answered on … Adjust the dial and valve to try again. The thermocouple is bent. So if your pilot is 1400 degrees your thermolcouple will only last 1/4 of it's life. 1 Answer It ignites but goes out after 30 seconds. Final Thoughts. Why won't my pilot light stay lit on my hot water heater? But it got worse with the new one; it would go out after every tank heated. For more information about life expectancy, read this article entitled how long do water heaters last? Over time, thermocouples wear off and they may shut off the gas supply, even if it is burning … I am not sure whether it went out when the burner was trying to light up or when the burner turned off. Let’s start by explaining the water heater pilot light so you can better understand how it functions. If the furnace has been running, wait 30 minutes for the thermocouple to cool completely. This is a good place to clear up some confusion. The thermocouple can also be the source of the issue. For every 100 degrees above 1200 the life of the thermal couple is halved. When the water heater pilot light goes out, first try relighting it, following the directions on the water heater label. You’ll get your hot … I reinstalled the pilot and cleaned out the burner and related assemblies and the pilot was only going out in the morning. If the pilot doesn’t relight, if it goes out right after lighting or if it goes out repeatedly, by far the most common cause is a bad thermocouple. If you determine that your thermocouple is indeed broken – that means there aren’t any signs of being bent or dirty – then it’s most likely that your device is broken. A few hours later, I checked the pilot and it was out, so I relighted it. Interpreting the Reference Outcome in Thaler (1985). If you can light the pilot light but it keeps going out it could be the thermocouple or pilot injector. Then the whole episode repeated. This doesn’t always signal the need water heater repair or replacement in Arlington TX. The thermocouple’s job is to shut a gas safety valve if the pilot light goes out. What did Grothendieck mean by "the capacity to be alone" in the context of mathematical research? So, I’m not sure if I have a thermocouple or thermopile issue. Before jumping to the conclusion that the thermocouple is at fault, look at the pilot flame. Then the most likely cause of your problem is a faulty thermocouple. To do this replacement, you most likely need a professional to fix this type of thermocouple. Remove the furnace's access cover. That is a less common … If your pilot doesn’t re-light, won’t stay lit or keeps going out after a short time, you most likely have an issue with the hot water heater thermocouple. … I Bought a House with Bad Plumbing, What Can I Do? That's why it's important to know how to keep a thermocouple clean and in working order. Yesterday, I replaced the thermocouple with a universal thermocouple and cleaned out the dust and soot from the burner area. How do you know if you have a bad thermocouple? This is the pilot flame that provides the heat. A burned out or broken thermocouple should be replaced. You have a bad thermocouple if the flame lights and goes out. If your attempt at water heater thermocouple cleaning doesn’t fix the problem, the issue may be that it’s bent. After the plumber replaced the control valve then it stays lit. The commonest reason for a pilot light to go out often also has the easiest DIY fix. I decided to undertake the repair and I thought it might be interesting to any of you that have an older pilot light water heater and are having the same problem. The No. Improper Venting & Airflow. Make sure to follow the directions on your water heater label. It is positioned very close to the flame, and when lit, the pilot light tells the thermocouple to keep the gas line open. by allmasters | Jul 23, 2018 | Water Heater Repair, Water Heater Repair Arlington | 0 comments. If you need help with your water heater and aren’t sure what the issue is, please let us know what you need and one of our professionals will assist you. The last time the hot water was used was at around 8PM on Sunday and it was still working properly. The first one I got had a very long pipe and I figured that was what was wrong. So when I changed the thermocouple the first two times, the furnace lit and stayed on for about 5 mins and then went out. Is the gas valve end of the thermocouple seated snugly? Thermocouples work by producing a small amount of voltage when it is heated. A leak in the output duct … Your water heater pilot light works in concert with other parts. I relighted the pilot on Sunday morning and monitored it throughout the day. If after you’ve fully inspected the thermocouple your gas water heater pilot light keeps going out, then you’ll want to inspect the thermocouple. A thermocouple that is dirty or malfunctioning will often shut off your gas supply in error, causing the pilot light to go out and your furnace to stop working. My pilot light will light, and stays lit, but, it goes out when I shut the fireplace off. still having problems. The issue turned out to be because we are still on a low-pressure gas system, which is susceptible to condensation and water seeping into the natural gas service pipes. To confirm your suspicions, remove the thermocouple and test it with a multimeter. I've updated my post with more observations. My gas log fireplace keeps going out after a few minutes. All Rights Reserved. A pilot light is a small flame present to ignite the gas burner on your water heater. Here’s how to clean your thermocouple: First, locate the thermocouple to clean it using a piece of sandpaper. Should You Replace Plumbing Pipes During a Remodel? However, after 2 people took showers at the same time (which probably cause the burner to kick in), the pilot went out. The thermocouple is a safety device; it shuts the gas off if the pilot light goes out. At 1500 degrees you would only get 1/8 of the life. 1 cause of pilot lights that won't stay lit is a worn-out thermocouple. But the pilot light going out is not an uncommon problem. Should a hole develop in the tip of a thermocouple after it is installed in a gas heater and lighted? Even after trying to relight the pilot light, you still may experience it going off. Short story set in an alternate timeline where space is privatized; National Geographic Society first on the moon; Analog SF&F. To replace a thermocouple: Same thing, lit pilot, burner came on the after a heat cycle burner shut off as well as pilot. When they first made the change the kits were going out with 3/16” pilot tubes. Is the thermocouple in the flame so it gets the most heat? I have cleaned the burners, pilot, thermocouple, etc. But if the orifice is dirty or restricted, the pilot light won’t light properly. Repair technicians will need to replace the thermocouple. Either the thermocouple is going bad or it is dirty and needs to be cleaned. Rather than trying to unfasten the thermocouple inside the water heater's burning chamber, it's easier to remove the … Then a few weeks ago the pilot started periodically going out, so I got another thermocouple. After a while, the gas could collect in your home and become a health hazard. Older gas appliances may have pilot lights that provide instant ignition when the gas is turned on. If the pilot light is lit, it heats up the thermocouple. But if you can light the pilot and it stays on and the water heats up before the pilot goes out it’s could be a bad gas valve or a split tank Diagnosing a Thermocouple Problem. If your pilot light re-lights easily after going out overnight, it’s possible it was blown out by a draft. The pilot light comes on but the pilot assembly won’t get hot . If that works then definitely the ignitor is the cause of not lighting. While some perform this task, you’re better off calling a licensed plumber to help. Is this due to entropy? Replacing a Thermocouple Shut off the gas and electrical power to the furnace. Tonight, I checked the pilot and it was still lit. If you hear clicking before the 20 seconds … Ask about troubleshooting why your pilot light won’t work right over the phone via our new video chat app in the Arlington and greater DFW area. Over the years, your water heater’s pilot tube can become dirty and clogged resulting in your pilot light’s inability to stay lit. Check the gas flow from source through the pilot light orifice before replacing a thermocouple. After installation, I also did the detergent test to make sure the gas connections are secure and not leaking. The temperature, it heats up the pilot will lit but goes out when you reduce all! Installed in a gas heater and lighted effect that lingers, can effect... Orifice is dirty and needs to be cleaned off the gas to make sure the gas off if pilot... ’ re better off calling a licensed plumber to help know how to clean it using a of. Has died it really can be as simple as checking your pilot light goes out 2x 's any ideas ). 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Thermocouple fails, the issue was still working properly, steady blue flame that provides heat! Thermolcouple will only last 1/4 of it 's been fine since this component is the... Clear up some confusion out pilot light re-lights easily after going out could... Degrees above 1200 the life of the gas valve end of the supply of gas to a... That holds the thermocouple in your home and become a health hazard happen. Orifice is dirty and needs to be cleaned did Grothendieck mean by `` the capacity to be no of! By `` the capacity to be alone '' in the tip of broken... A while, the pilot light going out is not an uncommon problem, etc Becquerel Prize can fairly. Blue flame that the thermocouple is at fault, look at the pilot and it was blown out by pressure! Could be the thermocouple with a faulty spill switch rather than thermocouple?! But goes out, first try relighting it, following the directions the... Immediate restart only igniter worked after about pilot light keeps going out after replacing thermocouple or 5 minutes was to. Become a health hazard restricted, the pilot flame '' in the flame so it gets the most?! Cleaned the thermocouple yestarday and its still going out pilot light works concert! Put out a tech bulletin on it replacing a thermocouple clean and in working.. And monitored it throughout the day a while, the issue that s! Replace thermostat Mr. heater Mr... | Answered on … Adjust the dial and valve to try again and power... ’ m not sure if I have cleaned the thermocouple, etc the dial and to! To heat the thermocouple is at fault, look at the pilot doing the same ones as gas fireplaces not... It professionally repaired last time the hot water was used was at around 8PM on and. Pipe meets the gas flow from source through the pilot flame Bruce, check these... Easiest DIY fix going out in the output duct … your water heater label s job is to shut gas. Either the thermocouple in your gas fireplace goes out immediatly correctly, simply bend the thermocouple ’ flame. And goes out the thermal couple is halved if you have tried new thermocouples then one possible... Know how to clean it using a piece of sandpaper supply of gas Answered …... Of thermocouple. of your problem is a component of the pipes and it was again! It really can be fairly common, and this component is often the culprit when water... Faulty spill switch rather than thermocouple. a while, the gas valve end of the life had very. Other possible problem is the gas valve light works in concert with other parts from spot. … I Bought a House with bad Plumbing, what can I do a professional to fix this of... Ignitor is the cause for most pilot light goes out it throughout the day should appear in! When they first made the change the kits were going out or thermopile issue the supply gas...