The pilot end of the thermocouple and the pilot are held side by side in a bracket that’s anchored to the burner. Step 2: Under the mounting bracket at the thermocouple tube, unscrew the bracket nut that holds the tube in place. Turn the gas back on and follow the lighting instructions on the water heater. If a water heater pilot won't light at all, the thermocouple probably isn't the problem. (no other water heater companies have left hand thread on there thermocouple) Since may law suits they have changed this design. How To Replace a Thermocouple . After decades of use, your water heater’s thermocouple can become decalibrated. Here we cover how to clean a thermocouple on a water heater. Turn the gas supply back on. Turn the knob clockwise to the off position. 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. After decades of use, your water heater’s thermocouple can become decalibrated. Expect to pay a minimal cost for the thermocouple; you'll save a lot of money by replacing it yourself. Another option is to call a heating repair person near you. Replacement water heater thermocouple, That’s all, nothing else. When you have the burner unit free from the water heater use the appropriate screwdriver to loosen the screw that holds the bracket for the thermocouple. When the junction is heated, the thermocouple produces a small electric current, which controls the flow of gas from the gas supply valve. Attach the thermocouple and reinstall the burner assembly. Replacing the Thermocouple. Remove the shields from the access area of the water heater. Unfasten the three nuts that hold the thermocouple and the two gas tubes to the valve. 99% of the time they will send you the new coupler under warranty. The gas water heater thermocouple is the safety element that is designed to "inform" a gas control valve is the pilot flame ON or OFF, and open or close the gas to the main burner. Check for gas leaks by applying soapy water to joints and looking for bubbles while the main burner is firing. Installing a new thermocouple on a Weil-McLain boiler will keep the system running safely and prevent gas from entering the room without being burned off. Position the thermocouple tip so that the pilot flame heats the top 1/2 inch of the tip. A new one costs about $5 to $10 and is easy to install: Make sure that the gas controller is in the off position before attempting this repair. Reinstall covers: a flame shield or manifold door that you removed from the heater or water heater. You can follow the steps mentioned below to know more. A gas water heater in Boise, Baton Rouge, Buffalo or Boston uses a thermocouple that includes a probe attached to a copper tube that screws into a port on the gas valve. How to Clean the Thermocouple on a Water Heater — FAQs Nationally, the average cost of installing a water heater ranges from $500 to $1,000 depending on the type and size of water heater (measured in gallons) and the rates charged by the installer.Water heater installation cost typically is made up of two parts: the cost of the appliance and the cost of labor. The thermocouple is usually attached to the pilot gas supply tube with one or more clips that snap into place. Ensure that the gas regulator is in the off mode prior to attempting this repair. It is connected to the gas control valve located on the exterior of your water heater tank and its job is to convert the heat from the pilot flame into an electrical current. Thermocouples are also found in boilers without pilot lights. A hot water heater thermocouple is a component that controls the gas flow to your natural gas hot water heater. Turn off the water heater. Let it cool if it was on before you started, maybe 10 minutes. It’s easy to replace and a new one costs $5 to $10. It is connected to the gas control valve located on the exterior of your water heater tank and its job is to convert the heat from the pilot flame into an electrical current. To make your task easier, we came up with a straightforward approach you can use to replace your in your water heater. Spare Pilot Water Heater – Replacement Thermocouple. How to replace a gas water heater thermocouple with video instructions. If the new water heater is shorter and the old wires won't reach, surface-mount a 4-in. Set a multimeter device on millivolts and measure the thermocouples current. Repair versus replace. So you need to be sure before you start the replacement procedure. On occasion your water heater thermocouple will need to be replaced due to corrosion or breakage. A good rule of thumb is that water heater’s life expectancy is 9 years. Is this a water heater or a Central Unit heater? Find gas main cut-off valve on the pipe. metal electrical box on the wall or ceiling nearby, run the old wires to the box, and then run a new section of armored cable or electrical conduit to the water heater. Replace the two-piece wire connector onto the thermocouple and igniter wire, securing it with the retainer clip, and slide the manifold burner assembly back into the water heater. 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. Removing the thermocouple is easy and it requires only a screwdriver. x 1-1/2 in. If your pilot light won’t stay lit, the thermocouple probably needs to be replaced. If the water heater is still failing to heat the water, the thermocouple may be completely defective, the pilot itself could be restricted, the igniter could be faulty, the gas valve could be malfunctioning, or the pressure switch in the power vent blower housing may have failed. Remove the old thermocouple from the bracket. This confuses your boiler, so to be on the safe side, it cuts off the gas to the pilot light. Test if your thermocouple is defective by pressing and holding down the pilot button for a few seconds. Your problem now is that the pilot won’t stay alight without the thermocouple working, so your boiler now won’t fire. The No. To get the thermocouple out, you need to loosen and remove the nuts with the wrench that are connected to the thermocouple. How to Change Thermocouple in Hot Water Heater – What the Heck is a Thermocouple? 1 cause of pilot lights that won’t stay lit is a worn-out thermocouple. A thermocouple that tests below 25 millivolts won’t be able to keep the pilot flame lit. Leaks: Generally not affordable to repair, unless the unit is still under warranty. Thread the new thermocouple through the hole in the manifold door where you removed the two-piece wire connector, and push it into the pilot bracket. This OEM quality Electric Water Heater Tune-Up Kit provides a quick and easy way to repair the most common items on an electric water heater. Install the new one the same way that you removed the old one. This is a good time to vacuum out the burner compartment, check for water leaks and remove debris in the burner ports.
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