I've used this furnace for over 15 years without replacing the thermocouple. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Learn how to replace the thermopile in this video: https://youtu.be/Yx2gfgJB7bI Conventional Gas Valve | Pilot Won't Stay Lit https://youtu.be/Lu5GvbvspMwCurious about how gas water heaters work? Can I replace just the gas valve or do I need to replace the whole module? Although a blocked gas line is one reason why the pilot light on a Rheem water heater won't light or stay lit, there are other reasons as well--some easier to correct than others. Share this conversation. I have seen people try 4 thermocouples and the fifth one worked then they claimed the other four were bad. By James Carey, Morris Carey . A universal thermocouple is inexpensive and can be purchased at most major hardware stores. If your gas water heater uses a pilot light for ignition, relight the pilot if necessary. One week later, the pilot would light but go out when button released. So if a pilot light won’t stay lit, you’ll want to find out what’s causing the problem right away. my pilot light won't stay lit. The thermocouple is triggered by an electric current produced by the pilot light. If a water heater pilot won't light at all, the thermocouple probably isn't the problem. Make sure to follow the directions on your water heater label. It's installed correctly. I replaced the thermocouple. How is HTTPS protected against MITM attacks by other countries? I've used this furnace for over 15 years without replacing the thermocouple. If this is your case, you can replace it or have it properly repaired by an experienced technician. Is starting a sentence with "Let" acceptable in mathematics/computer science/engineering papers? rev 2020.12.18.38240, 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, Seems this model was made between 1967 and 1969. The procedure for lighting a standing pilot always includes lighting the flame, then manually holding in the gas valve to keep the flame burning and give the thermocouple time to heat up. If the pilot lights but the flame goes out as soon as you release the button after holding it for 60 seconds, then the thermocouple … Some times with old lines particles can cause valve problems, Millivolt valves can fail for water in the line this is why we usually have a drip leg prior to the valve. A complete graph on 5 vertices with coloured edges. The pilot in my gas water heater (Aquamax 205) has been going out sporadically over the last 2 weeks. The No. If the unit is more than 10 years old it may not be worth the expense to replace the gas valve since the tank could leak at any time. my pilot light won't stay lit. Thanks. Sometimes, the tube might be partially clogged and supplying very little gas for combustion- No wonder your pilot light keeps going out. Sometimes if the gas valve is just barely bad a hotter thermocouple will work for a short time but finding a hotter thermocouple is just hit and miss. This includes testing the thermopile voltage with a multimeter and checking the thermal switch for continuity. This can happen with age. Test for Gas Leaks. Replace the burner assembly if it's at fault. Sometimes it's referred to as the "flame sensor." If your pilot light gets lit but it won’t stay for long, then there is a problem in the thermocouple. Replace the thermostat if it doesn't turn on the burner to heat the water. Can someone recommend the next best course of action to keep my pilot lit? 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. A couple of days go by, and as I'm changing the humidifier filter, I notice the pilot light is out once again. If a disembodied mind/soul can think, what does the brain do? Why isn't the spark gap lighting the pilot on my furnace? If you have a gas water heater with a pilot light that won’t stay lit, it’s probably due to a failed thermocouple. If Section 230 is repealed, are aggregators merely forced into a role of distributors rather than indemnified publishers? In simple terms, it’s a short piece of tubing that runs from the gas controller to the pilot. Why Water Heater Pilot Light Won’t Stay Lit After Replacing Thermocouple? A Dirty Thermocouple. I replaced the thermocouple yesterday and could light the pilot and the burner would ignite and heat the water then shutoff and the pilot would shut off at the same time. No drafts. The furnace is definitely over 30 years old and was likely installed in the 60's. Pilot won't stay lit after replacing thermocouple. The gas supply to the pilot assembly is controlled by this valve. The procedure for lighting a standing pilot always includes lighting the flame, then manually holding in the gas valve to keep the flame burning and give the thermocouple time to heat up. Ask Your Own Appliance Question. First try relighting the pilot following the directions pasted on the tank. I added a picture of what it looks like. Relight the pilot light. If it still won't stay lit then just replace it. I suspected the thermocouple and replaced it, but this didn't fix the problem. In some cases, it could also be an indicator of potential gas buildup. Now I can't get the pilot to stay lit at all. This will allow you to … I would see if you can hear the valve actuating if you can there may be some rust, moisture or even flakes of pipe dope that is preventing it from working. Pilot on white rodgers rv hot water heater won't stay lit. 2. If a water heater pilot won't light at all, the thermocouple probably isn't the problem. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. This control is part of the gas valve assembly and normally has a dial that will allow for temperature adjustment and will also have a probe that monitors the water temperature. When a gas water heater pilot won’t stay lit, the water heater can’t heat the water inside the tank. Once you’re done, put it back and light your water heater. When the gas burner comes on, use a 50/50 dish soap/water mix to test the screw joints for air bubbles that indicate leaks. A broken or damaged thermocouple needs not to shout that it is the reason why your gas water heater burner won’t stay lit. Yesterday, I replaced the thermocouple with a universal thermocouple and cleaned out the dust and soot from the burner area. There is a chance that your thermocouple has simply gone bad and is the reason your pilot light won’t stay lit. Is Mr. Biden the first to create an "Office of the President-Elect" set? When I light the pilot light it will stay lit, but once I turn up the thermostat the burner will only run for 10-20 seconds and then the burner and pilot light both go out instantly. When your thermocouple detects an unlit pilot, it automatically shuts off the gas to your water heater as a safety precaution. If your gas water heater doesn’t stay lit, you may have a defective control thermostat. I suspected the thermocouple and replaced it, but this didn't fix the problem. I get a nice blue flame. When I go to light pilot light, I hold down the knob for 60 seconds, as soon as I let up on the knob the pilot goes out. It’s responsible for closing the gas valve when it senses the pilot light is off. If you’re fairly certain this is the source of the problem, you will either need to have the thermocouple replaced or repaired. Of potential gas buildup it does n't turn on the burner thermocouple from. 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