A build-up of carbon may have formed on the thermocouple and is acting as an insulator. var dteNow = new Date(); Reconnect the burner assembly and open the gas inlet valve before lighting the pilot. If the multimeter reads OL or open loop, then there's no continuity and the switch will need to be replaced. Many people think that if the thermocouple malfunctions that it's necessary to replace the entire water heater, but in reality, they are actually relatively easy to repair and not too expensive. Free delivery offer excludes same day delivery. You'll need to disconnect the thermocouple, main supply tube, and pilot supply tube before pulling the burn assembly out.
Some thermo cutoff switches have a reset button, others will reset automatically, and still others use a one-time fuse. If the reading is below 20 millivolts, the pilot may have difficulty staying lit. After viewing product detail pages, look here to find an easy way to navigate back to pages you are interested in. Be the first to hear about special offers, events, popular new items and helpful home improvement tips.
Set the multimeter to the volts DC option. L 0.03 V Millivolt Universal Thermocouple, Honeywell 18 in. You'll need a multimeter to perform this test. You can remove the thermocouple and. If your thermocouple is bad, the pilot light will not be lit. Since a malfunctioning thermocouple will shut off the gas valve, your water heater won't have the resources it needs to heat the water in the tank. Over the next few minutes, the voltage should begin to rise as the thermocouple heats up. As we mentioned above, your water heater may use a flame sensor instead of a thermocouple. Youre seeing this ad based on the products relevance to your search query. Timsec 2Packs Propane Tank Top Heater Thermocoupler 2304885, F237349, Fasten Type Thermocouple Safety Assembly Kit, Compatible with Mr Heater, Dura Heat, COSTWAY, Remington, ProCom and More, Water Heater Pilot Assembely With Pilot Thermocouple and Tubing Natural Gas, EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology, Thermocouple Replacement for A.O.Smith Gas Furnace Water Heater 24" Thermocouple TC-K24, Rheem UV6379R UV6379R-Thermocouple, Silver/Pewter, Home Repair Parts Replacement Bradford Red Water Heater Temperature Thermal Reset Safety Switch, Rheem SP6379M SP6379M-Thermocouple-19 In, Small, Resideo CQ100A1039 Replacement Thermocouple for Gas Furnaces, Boilers and Water Heaters, 30-Inch, Reliance Water Heater Pilot Assembly 100109295 Genuine OEM Replacement Part Natural Gas Compatible with Reliance, A.O.
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Handyman Service is currently not available in your area. If the temperature in the combustion chamber gets too high, the switch will trip and cut power to the valve. Remove the bottom plate that covers the burner assembly. The thermo cutoff switch is wired in series with the thermocouple. 
While these differences are worth considering, they're not ultimately all that impactful. Difference Between a Thermocouple and a Flame Sensor. The majority of heaters can use a 24-inch thermocouple, but if you're uncertain, it's best to buy a longer one and carefully coil the excess inside the panel.
L 0.03 V Millivolt Universal Thermocouple, Honeywell 30 in. When the voltage drops, the gas valve closes. Price and other details may vary based on product size and color. 2022 Ace Hardware.
Our Product Selector can provide a personalized recommendation. Turn the gas back on and light the pilot. Light the pilot and hold down the button. A healthy thermocouple should read between 20 and 30 millivolts in an open circuit test. When the thermocouple is working properly it uses a phenomenon called the Seebeck Effect. var intYear = dteNow.getFullYear(); We'll reach out to you shortly to discuss your project and answer any questions you may have. Test for gas leaks with a soap solution at the pilot and main burner connections. 11 product ratings - Rheem Natural Propane Gas hot water heater GASKET REPLACEMENT KIT w THERMOCOUPLE, 2 product ratings - Copper 24" Universal Thermocouple Kit for Gas Furnace or Gas Water Heater, 1 product ratings - LOT OF 2 Eastman 60035 18" Copper Thermocouple w/ Adapter for Gas Water Heater. Smith, and State Branded Tanks, Rheem AM39860-1 Water Heater Burner Assembly - RG4, KD 1300W Immersion Bucket Water Heater, Auto Shutoff, Overheating Prevention, Auto Water Level Senor, Adjustable Thermostat, Easy-to-Use (RED / 1300 WATT), TWTADE 2 Pcs 3M 10K B3950 Thermistor Temperature Sensor,able to Support -25 to 125 Degree Celsius,Sensitive NTC Temperature Sensor Probeprobes has 5 * 25mm Stainless Steel housing NTC-3M-2P, All customers get FREE Shipping on orders over $25 shipped by Amazon. Sign in for faster checkout and to redeem and earn rewards! Not a member? Privacy Policy.
All rights reserved. Here's what to do: If the thermal cutoff switch is good and the pilot still won't stay lit, then test the thermocouple. If you try to light your pilot and it won't stay lit, it may be an indication of either a faulty thermo cutoff switch or the thermocouple. State Industries. For screen reader problems with this website, please call. The electrical current generated is less voltage than a AA battery, but it's enough to power the gas valve. Some people choose to simply replace their thermocouple when they can't keep the pilot light lit, but here's how to test to see what's actually happening. 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Although, in some cases the problem can be fixed, most homeowners choose to replace the thermocouple since they are so inexpensive. A standing pilot water heater uses a pilot flame which burns continuously and ignites the main burner when heat is needed. 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Shop products from small business brands sold in Amazons store. Reconnect the thermocouple ignitor wire, main burner supply, and pilot tubing to the gas control valve. The thermocouple is part of the water heater's burner assembly and is positioned next to the pilot light. Before starting, you'll need to find the right sizethermocouple for your water heater. On the gas control valve, disconnect the thermocouple ignitor wire, main burner supply, and pilot tubing. It slides into a bracket and is held in place by a couple of clips. See Details, I am interested in: (check all that apply). var dteNow = new Date(); We'll explain the role of a thermocouple, how to troubleshoot a problem, and even show you how to replace the part when it malfunctions. Honeywell 24 in. It's critical that if at any point you notice a strong gas smell to shut off the gas supply and call a professional plumber to help you determine the cause. THERMOCOUPLE 18 INCH REPLACEMENT FOR BOILERS, FURNACES, WATER HEATERS. This is where two metal rods create a tiny electrical current, which keeps your water heater's gas valve open. Whether your water heater is having troubles or you simply want to learn more about this critical component, this article will help you gather the information you need. We highly recommend calling a professional to do the work for you if you're at all worried about working with natural gas appliances. document.write(intYear); A water heater thermocouple is an important component of gas-powered water heaters. Ace Rewards members are eligible to receive free delivery on orders of $50 or more. Ace Rewards members spending $50 or more are eligible to receive free Next Day delivery on in-stock orders. Replace the burner assembly in the exact position it was before. Check the thermal cutoff switch for a reset button. 110-326 Water Heater Thermostat,Natural Gas Water Heater Valve Uni-Kit W/ 1-3/8" Shank,3-1/2" W.C,Comes with Replacement Thermocouple. 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Something went wrong. Sales Rep Login. Both thermocouples and flame sensors perform the same job, and in the end, that's really all that matters. Participation and delivery area vary by store. Once the pilot light has been re-lit, the thermocouple will warm and begin generating the necessary voltage to open the gas valve. Why Does a Water Heater Thermocouple Go Bad? A flame sensor is typically found on newer water heaters that use an electronic controller, where thermocouples are found on older heaters. Check your owner's manual to see if your heater is equipped with electronic ignition. document.write('© ' + intYear + ','); L 0.03 V Millivolt Universal Thermocouple. Customer Service | American Water Heaters. Next to the pilot is the thermocouple which generates a small electrical current when it's heated by the pilot flame. Select 2 or more products for side-by-side feature comparison. Copyright 1995-2022 eBay Inc. All Rights Reserved. To do this, you'll need to light the pilot and test the voltage. 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Your recently viewed items and featured recommendations, Select the department you want to search in, Trusted ClimaTek Ignitors for your Kitchen. The thermo cutoff switch is located on the front of the combustion chamber. Ace Rewards members spending $50 or more are eligible to receive free Next Day delivery on in-stock orders. When the pilot light is no longer lit, the thermocouple cools to a point where it is no longer generating the voltage necessary to keep the gas valve open. Remove the cover and check the electrical connections to make sure they are secure. Shut off the gas supply to the water heater. Orders must be placed on days the store is open, before 4pm local time or 2 hours before store closing time, whichever is earlier. Ace Hardware and the Ace Hardware logo are registered trademarks of Ace Hardware Corporation. Remove the thermocouple from the pilot assembly and replace it with a new thermocouple.
It's designed to basically shut down the thermocouple if temperatures within the chamber reach above 160 to 180F. As an Amazon Associate we earn from qualifying purchases. Propane Gas, Short shank, Right handed threads, Natural Gas - over 55,000 BTU's - Short Shank, Propane Gas - Long shank, 2-5/8" Shank, Right handed threads, Covertible Control - Long shank, (Mobile home models only), Convertible Control - Short shank, (Moble home models only), Propane Gas - Short shank, Left handed threads, Propane Gas - Long shank, Left handed threads. All Rights Reserved. Password must be a minimum of 6 characters. However, you will be working with a live gas line, so use extreme caution throughout the replacement process.