If the reading is below 20 MV, it indicates that the thermocouple requires maintenance. It will light, butgoes out in a few seconds. Well, here are some methods to reignite the pilot light of your water heater: If you’re willing to reignite the pilot light by yourself, you should always be extra cautious. Water Heaters - A.O. The pilot light is next to the gas burner tube. Your technician will be able to advise you on what to do. First, switch the thermostat to heat mode and get it up to 80 degrees. If your gas-burning heating unit isn’t working, the first thing you probably do is check the pilot light, right? Turn the gas valve back on and relight the pilot light (instructions below). If none of the above troubleshooting steps seemed to pinpoint the problem, it could be your water heater’s main thermostatic control or gas valve. Now, find the pilot valve on the furnace, locate the on/off knob, and turn the knob ‘off.’. To fix this problem, locate the thermocouple and scrub it with sandpaper. Facebook. 1. Main Thermostatic Control or Gas Valve. How to Fix. Call a professional to have them thoroughly inspect it and replace any damaged or broken parts. It is a AO Smith promax GCV 40 100 water heater to be exact. Finding a professional technician you can trust near you is essential. Hi everyone, I have a 40 gallon promax a.o. Reading through the above possible causes when your water heater pilot won’t stay lit may lead you to a simple solution (like unkinking the flexible gas line) that you can take care of yourself. If this line is kinked or bent so that gas can’t flow, the pilot light won’t stay lit, and the burner won’t kick on. If it is flexible and visibly bent or kinked in one area, turn off the gas valve, wait 5-10 minutes for the gas to disperse, then try to … If it is flexible and visibly bent or kinked in one area, turn off the gas valve, wait 5-10 minutes for the gas to disperse, then try to carefully straighten it out. Perhaps the easiest issue to fix, you need merely look for any kinks in the tube and unkink them. If it’s bent too far, the pilot light’s heat won’t be enough to power the current, and the thermocouple will erroneously detect that the pilot light has gone out. When I press the pilot reset button (allows a small flow to generate the pilot light) and use the piezo sparker, it lights fine. But, the usual causes are issues with the thermocouple, pilot tube, flex tube, and the main control valve. If the gas furnace pilot light won’t stay lit, the thermocouple will shut down the gas valve, so gas cannot be released into the home. Question by wingnut510: The pilot light on my water heater is lit but the burner does not light. The most common problem is a faulty thermocouple (explained in detail below). Normally, this is a good thing. If it is, they will need to either repair or replace the part. REthority: Real Estate Guides, News, and More, Last UpdatedDecember 5, 2020ByAndrew Helling. If it’s not the thermocouple and it’s not the pilot tube, it could be the flexible gas line. We may earn a commission when you click our links. 0. Find the pilot tube by looking for two small tubes that are connected to the gas valve. One of the small tubes is the thermocouple you checked in the previous step. Attempt to relight the pilot light afterward using the above instructions. 3. What is control thermostat actually? Find the five most common reasons a water heater pilot won’t stay lit. This is a question from a reader to Chris Dougherty, Certified RV Technician, when he was our technical editor Dear Chris, My automatic ignition hot water heater in our motor home ignites but won’t stay on. Keep holding the gas knob or button down for a minute or so to ensure the pilot light gets plenty of gas flow. Viewed 6k times 1. Sometimes, it makes more sense to just replace it. It’s what burns the incoming natural gas to heat the water. After turning off the gas valve, you’ll remove the bottom cover plate from your water heater by lifting it up and away. If the thermocouple of your water heater has no issue, it could be the filthy pilot tube. Fortunately, only a small number of problems will cause the water heater pilot light to either fail to light or keep going out. EarthandHuman.org is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for website owners to earn advertising fees by advertising and linking to amazon(.com, .co.uk, .ca etc) and any other website that may be affiliated with Amazon Service LLC Associates Program. Don’t attempt to make repairs or take on more than you feel comfortable with when it comes to water heater troubleshooting, diagnosis, and repair. Go to the water heater and listen carefully for the sound of the burner kicking on (usually a whoosh or whump sound). Turn the thermostat dial (Dial on the front) back to zero. May 30, 2016. In either case, make sure you turn off the gas for safety. The pilot tube needs to be clear to allow gas to reach the pilot. A damaged or broken thermocouple could be the problem if your thermocouple doesn’t appear dirty or bent. It has a Suburban gas water heater. Observed that the pilot light is lit … This is one of the most common reasons the burner won’t stay lit, even when the pilot seems to be in working order. A bent, dirty, or damaged thermocouple could be the reason your water heater pilot won’t stay lit. The thermocouple is an important component you’ll see in most modern gas water heaters. In this case, you should repair the thermocouple, or replace it. If your water heater has a faulty burner, it will not ignite the unit, causing the pilot light to turn off. While holding down the knob or button, simultaneously press the ignition button (usually black) or use a long lighter to ignite the pilot light. Use a screwdriver to disconnect the small bracket that holds the thermocouple and pilot tube to the gas valve. Press and hold the pilot button down for at least 30 seconds to purge through gas. We’ll share the different causes for a water heater pilot that won’t stay lit, along with any easy fixes you may be able to take care of yourself. No hot water! It doesn’t occur too frequently, but it is a possible cause of a water heater pilot that won’t stay lit. Gas hot water heater troubleshooting always seems to start with the pilot light. Sometimes, you’ll hear this called the main control valve. Why Won’t My Water Heater Light? Video of Rheem Water Heater not staying lit. If you suspect that the burner of your water heater is damaged, the only way to solve this is by replacing the entire burner. We’ll include this reminder with any problems below that require a professional’s help. Method 1: Modifying the Setup. Discussion Starter • #1 • May 10, 2017. I've had this unit since I bought my house 12 years ago and would have been installed way before that. are usually efficient and high-performing water heaters. Share. Any ideas? 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