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thermocouple failure

Boilerpro_3
Boilerpro_3 Member Posts: 1,231
in THE MAIN WALL
or hitting the thermocouple too low, you will burn them up. The thermocouple should be a dull red at most and the flame should hit the top 3/8 to 1/2 inch.

Boilerpro

Comments

  • Jack_19
    Jack_19 Member Posts: 16
    thermocouples.

    thermocouple failure, last one lasted one week the one before one year,where can I buy a heavy duty one for a slant-fin gg125 hot water boiler. Thanks, Jack.
  • Unknown
    Unknown
    Johnson Controls make

    a nickel plated high ambient temperature thermocouple Model # K16RA. I would suggest also as Boilerpro has posted to make sure pilot is adjusted correctly. I would also do a combustion analysis to determine if you are having a poor combustion condition.
  • GW
    GW Member Posts: 4,896
    measure the MV

    Haven't you been to Timmie's school?

    :)

    Gary

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    Gary Wilson
    Wilson Services, Inc
    Northampton, MA
    gary@wilsonph.com
  • Boiler Guy
    Boiler Guy Member Posts: 585
    Too high

    Slant fin used to mount their pilots very low because of the high combustion zone temps overheating the pilots. Check to see if some one remounted the pilot only on the top screw hole therby extending the thermocouple too highand causing overheating
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