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  1. #27
    Join Date
    Dec 2011
    Posts
    33
    sandpaper or steelwool

  2. #28
    Join Date
    Jan 2005
    Location
    Columbia, Mo GO, TIGERS
    Posts
    899
    [QUOTE=bja105;11649892

    A flame sensor is just a steel rod with a ceramic insulator, get it reasonably clean and it will work.[/QUOTE]


    Guy I used to work with told me they were in a bind one night, out in the country, rigged in an eight penny finish nail to get them through till morning.

  3. #29
    Join Date
    Feb 2010
    Location
    In a boiler room
    Posts
    7,050
    Wire brush followed by a clean rag has always worked for me.

    Keep in mind the burner needs to be reasonably clean as well for good flame signal.

  4. #30
    Join Date
    May 2011
    Location
    Washington, DC
    Posts
    947
    As mentioned, it's said not to use emory cloth or a wire brush because of the possibilities of pitting/scoring the flame rod. It's recommended to use double "00" steel wool pads to clean them. I have also used my sand paper and brushes in a pinch and didn't have a resulting call back. So who knows, sometimes you just gotta do what you gotta do. But to my understanding that is the official recommendation.

  5. #31
    Join Date
    Feb 2004
    Posts
    2,458
    Last month my B-I-L from Salt lake called about his son's furnace short cycling. Told him to clean the flame rod with whatever was handy, such as a dollar bill. Well he called me later and said his son used a twenty so I guess he thought it was 20 times cleaner.

  6. #32
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,615
    I have been using sanding cloth for years to clean flame sensors and have not had any problems ,try cleaning the green build up from propane with a dollar bill and let met know how it works out

  7. #33
    Join Date
    Jul 2001
    Location
    Central MN and the Twin Cities
    Posts
    1,530
    What does it take for you guys to replace the sensor?? I do light cleaning as part of maint..... but if its getting old and the signal is not up after cleaning I replace them. Besides there is a warranty on new parts but not a cleaning of an old one.
    Warning: Just because I am over the head injury doesn't mean I'm normal!

    The day I stop learning.... I'm dead!

  8. #34
    Join Date
    Feb 2004
    Posts
    2,458
    Quote Originally Posted by grasshopper View Post
    What does it take for you guys to replace the sensor?? I do light cleaning as part of maint..... but if its getting old and the signal is not up after cleaning I replace them. Besides there is a warranty on new parts but not a cleaning of an old one.
    How low does the "signal" need to be. Do you take a reading before and after?

  9. #35
    Join Date
    Oct 2003
    Location
    las vegas
    Posts
    1,505
    the only failure i have ever found on a flame rod was a broken ceramic.
    i clean them with berryman b 12 carb. cleaner & scotchbrite orange
    pads.

  10. #36
    Join Date
    Jul 2001
    Location
    Anderson,SC
    Posts
    984
    Last year I was using a $20 bill, this year I use a $1 bill. Both work fine. In my dreams I would use a $100 bill.

    STUD

  11. #37
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,615
    Quote Originally Posted by grasshopper View Post
    What does it take for you guys to replace the sensor?? I do light cleaning as part of maint..... but if its getting old and the signal is not up after cleaning I replace them. Besides there is a warranty on new parts but not a cleaning of an old one.
    if it is a no heat service call and you do not have maintenance agreement ,if I have a new one that's what you get if on a tune up I clean it
    hardly ever replaced them on natural gas ,replaced several on propane as propane eats them up

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