I have an AO Smith Power Shot high efficiency water heater (9 years old) and I just replaced the burner assembly because it would not ignite. That small characteristic blue flame is essential for a gas water heater to work. I live in a mobile home so I do not know if that makes a difference but recently my furnace will not work. Determine what style of water heater you have. All of a sudden yesterday, thermostat clicks on and the pilot doesn't ignite a full flame to heat the room. The standing pilot light is burning. If the pilot cannot be cleaned, replace it. However, in some cases, other issues can prevent the pilot light from being lit. I replaced the thermocouple and the pilot light is fine. More serious issues. This can happen with age. If your pilot light stays lit, but the fireplace won’t start, then the problem is likely related to your thermopile, a metal probe (round and slightly smaller than your pinky finger) that converts heat from the burning pilot light’s flame into a tiny amount of electricity — just enough to open the gas valve when a switch (such as a wall switch or remote control button) is used. Tips and Tricks on how to Light your RV water Heater!www.TriCityRV.com Water Heater pilot light won't ignite ... bad . For more information about life expectancy, read this article entitled how long do water heaters last? Your heater's pilot light allows the burner to cycle on and off while maintaining the water in the tank at a constant temperature. When thermocouples wear out, the pilot light goes out, the burner won’t light, and you will have no hot water. Most gas hot water heaters us a pilot light to ignite the burner. The flame comes out of the burner assembly which, in turn, heats the water inside the boiler tank. Report This by Manage My Life. Replace the burner assembly if it's at fault. When your tankless water heater fails to produce hot water, its burners do not ignite when you open your hot water tap to start the flow of water. A hot surface ignition system uses an electronically controlled resistance heating element, not unlike a light bulb filament, to ignite the gas burner. Sometimes, carbon deposits can build up on the pilot and eventually create a restriction. Troubleshooting pilot light problems in gas water heaters. When the pilot light goes out for any reason, the thermocouple closes the burner's gas supply valve to prevent gas escaping and filling your house. The gas is on and the pilot is lit. If your gas water heater uses a pilot light for ignition, relight the pilot if necessary. Pilot light lit, but burners won't ignite? I turned everything off, and started from scratch after a while. ... You should be able to see a spark in the burner chamber when the blower switches on. How to fix a water heater when pilot light goes out, it does not light, it won't stay lit, or the flame is too small or too large. pilot lit on gas furnace, but the burners won't light; Pilot light stays lit on my gas water heater but burner doesn't work. Replace the pilot's thermocouple if the pilot won't stay lit after releasing the pilot button. Relight the pilot light. Note: You must have the pilot lit and the burner on to test for leaks, so that gas is flowing through the large tube. Chances are, it’s a problem with your burner. When a gas water heater pilot won’t stay lit, the water heater can’t heat the water inside the tank. 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. Power switch on, ignitor works and pilot stays lit, flame control doesn't seem to matter. Why won't the burners on my water heater ignite even though the pilot light stays on? You should be looking at the pipes that lead to the burners and pilot light. Water Heater Pilot Light Keeps Going Out? The initial flame of the pilot heats the thermocouple, which will signal the valve to stay open and keep the pilot lit and the propane heater functioning. ð•Since there are two flames on the pilot (o ne to heat the thermal -couple and one to light the burner) the port that lights the main burner, may be If the pilot cannot be cleaned, replace it. I've got an older Williams model Propane furnace (model # 450sfa-2) controlled by a Lux 1500 Thermostat, and I've tried everything I can think of. A while but burner does n't seem to matter on the pilot eventually.: 1 the heater will not ignite light, the water heater pilot won t. 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