It is not too much and neither too less, building up to a good investment. At a minimum, homeowners spent $50 for the furnace repair, while at the high end, the maximum cost was $800. If the furnace has been running, wait 30 minutes for the thermocouple to cool completely. Replacing it or upgrading it might run upwards of $600 for a newer smart style for a connected home. If it does, the boiler then shuts off the gas supply to the pilot light, thus preventing what would be in effect a gas leak. It will cost more if you have additional work to do to get it up and running. This is the box that the main gas line enters, where you turn the gas on in the furnace. Remove the furnace's access cover. You should also: Changing a filter should take only a few minutes for most people. Replacing a furnace condenser or evaporator coil costs $600 to $2,000 or more. When the pilot lit goes off due to the loss of heat, this device detects it and it cuts off the fuel supply. On a gas-fired furnace you may need to remove first the furnace cover and then a flame shield. ... Gas Furnace Troubleshooting. If cleaning the thermocouple didn’t allow your pilot light to stay lit, or cleaning the thermopile didn’t allow the pilot light to generate enough electricity to open your gas valve and ignite the burner, it might be time to replace … The job of the thermocouple is to sense whether or not there is a flame and to stop the flow of gas if there is not a flame. Regular maintenance keeps it clean and working longer. When the thermocouple detects the pilot light is OFF it will shut down the gas flow. Repairing an oil furnace costs about the same as gas or propane, or about $300 to $1,200 depending on what’s wrong with it. The national average cost of a standard efficiency natural gas furnace ranges from $2,150 to $5,900 with most homeowners paying around $3,100. To replace the thermocouple in a gas furnace: Turn off the gas knob, and the power to the burner. A molded ceramic fiber oil combustion chamber costs $200 to $600 to replace. Every gas appliance with a standing pilot that cycles on and off needs a thermocouple. This is so that gas is not allowed to leave the gas pipe if it's not going to be burned by the flame nozzles. To find it, first locate the gas control box. To replace a thermocouple: Step 1: Unscrew the copper lead and the connection nut inside the threaded connection to the gas line. Call Air Experts for Furnace Thermocouple Repair in the Raleigh, NC Area! The thermocouple will automatically shut off the flow of gas if pilot light goes out. Replacing a thermocouple costs $150 to $250, mostly due to labor time. The thermocouple looks like a piece of metal tubing smaller than a soda straw. It’s a thin metallic rod in front of the flame inside the unit used to detect a flame. Propane & natural gas furnace repairs cost between $300 to $1,200. If it is reaching fifteen years old, the cost of replacement may not be worth it. When their projects are done, they fill out a short cost survey. Our Furnace Installation Cost Guide can give you a better idea on both the general cost and the differences for brands like Amana, Bryant, Coleman, and others. (On most furnaces, it also houses the button that you hold open or push to relight the pilot.) New Gas furnace and Duct Work. Any competent handyman can fit one in about an hour - a gas … Most gas furnaces use either a flame sensor or a thermocouple, sometimes referred to as a "thermal coupler." A thermocouple is a safety device that helps control the gas supply in gas-heated furnaces. The Cost of a Bryant Gas Furnace. Repairing a thermostat costs $100 to $300. Typically a thermocouple connects to the bottom of a gas … As the name proposes, heater control boards are in charge of representing the operation of the furnace. Gas Furnace Replacement Prices, Repair & Installation Costs 2020 Overview of Gas and Propane Furnaces. 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