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    offshore one's Avatar
    offshore one Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Oct 13, 2007, 08:56 AM
    Burned out thermocouple
    As I had stated in a previous question I have a few minor problems with the furnace in the fourteen years we have it. This is the most annoying one. I have replaced it at least 20 times. A service man installed one that lasted only seven days. I had the gas company install one and it lasted three months. The longest they have ever lasted is maybe two years. I have adjusted the position in the flame and the intensity of the flame. Nothing seems to work. Thank you for your help
    hvac1000's Avatar
    hvac1000 Posts: 14,540, Reputation: 435
    Heating & Air Conditioning Expert
    		  
    #2

    Oct 13, 2007, 03:47 PM
    Something is causing the t couple to burn. Wrong pilot orifice,wrong pilot gas pressure, wrong t couple mounting to pilot assemble distance, t couple to close to main gas flame when furnace running. There are some stainless type high temp thermocouple available but you will have to search to find them. Most t couples are made of a copper alloy mix. Do not buy Jade aluminum units are junk.
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