1 cause of pilot lights that won't stay lit is a worn-out thermocouple. In other cases a bad gas valve can be at fault and is often blamed on the thermocouple. The gas valve will not open if the pilot flame is out and the thermocouple is cool. To replace a thermocouple with the newer closed combustion chambers you need to disassemble all the tubes from the gas valve and then remove the burner door and gasket. ... Rheem sent a step by step instruction sheet which was helpful. The instructions are the same for either propane or natural gas. Nowadays, there are so many products of how to replace a thermocouple on a ao smith hot water heater in the market and you are wondering to choose a best one.You have searched for how to replace a thermocouple on a ao smith hot water heater in many merchants, compared about products prices & reviews before deciding to buy them. 46. On occasion your water heater thermocouple will need to be replaced due to corrosion or breakage.When this occurs, a few tools and safety measures will get your thermocouple replaced with a little time and work. If the pilot light goes out, the thermocouple senses a loss of heat and the … Some repairs, such as tank leaks, may not be repairable and can signal that it’s time to replace … The heat of the pilot light flame creates millivolt current in the thermocouple which energizes a magnet that in turn allows the gas control valve to operate. Rheem / PROTECH SP20075 Pilot Assembly. Compatible with most brands. Replace a Thermocouple in a Ruud Ruud water heaters that have thermocouples are gas water heaters. Rheem Manufacturing ranks as the global leader in the manufacture of high-quality, sustainable, and innovative water heaters, tankless water heaters, air conditioners, furnaces, pool heaters, and HVAC systems for residential and commercial applications, and is a full member of AHRI, the Air-Conditioning, Heating, & Refrigeration Institute. Rather than trying to unfasten the thermocouple inside the water heater's burning chamber, it's easier to remove the whole burner and thermocouple assembly. Before beginning the task, he should press the red reset button on the thermostat and check the electrical panel for thrown circuits. When the pilot light on a gas water heater won't stay lit, the problem is usually a faulty thermocouple. ... Thermopile Voltage Low Rheem. The thermocouple is a small electrical device, but it is a critical safety component on your furnace. The cleaning solved the problem. Reconnect the burner, pilot and thermocouple to the gas valve. The Rheem 36" Universal Thermocouple RH623431 is for use with gas water heaters, furnaces, space heaters and fireplace logs. Reconnect the pilot supply tube, thermocouple, and main gas supply tube. Reconnect the piezo ignitor striker wire. The thermocouple is a safety device on a furnace. The diagram(s) below can help you find the right part. Good luck! The thermocouple responds to changes in temperature by producing an electrical current that causes the gas valve that supplies the pilot light to open when the temperature … How to replace the thermocouple if it is broken and how to test the element? At the base of the gas water heater there is a … 10. Turn on the water heater. Relight the pilot light too and wait to see if the water will heat up. Once you’re sure the thermocouple is clean, fix it back to the unit. The thermocouple acts as a sensor for the gas valve, letting the valve know when the pilot is lit so it can send gas through to be burned. This device generates a small electric signal to keep the gas valve open when the pilot is on. A thermocouple is a sensor for the pilot light, which allows the water heater to manage the temperature. 9. A gas heater with a standing pilot, which means a pilot that is always on, also has a thermocouple. To replace a thermocouple: Step 1: Unscrew the copper lead and the connection nut inside the threaded connection to the gas line. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple. This item Rheem SP20064 Thermocouple Replacement Kit. I don't see any clue that the old thermocouple can be replaced. Honeywell CQ100A1013/U Not Available CQ100A1013 24-Inch Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, quot. Here we cover how to clean a thermocouple on a water heater. Add to List. If the thermocouple feels the heat from a pilot light, it keeps the gas line open. 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