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  1. #40
    Join Date
    Jan 2003
    Location
    Minnesota
    Posts
    174
    Just wondering about the accuracy of the digital over a fluid manometer?
    "A man who carries a cat by the tail learns something he can learn in
    no other way."
    -Mark Twain, American writer (1835-1910)

  2. #41
    Join Date
    Nov 2009
    Location
    Northwest Illinois
    Posts
    277
    Quote Originally Posted by Phase Loss View Post
    DO NOT STICK THE MANOMETER IN YOUR BUTTHOLE
    The much needed comic relief on this post! Almost spit out my drink when I read that!

  3. #42
    Join Date
    Mar 2011
    Location
    North Carolina Piedmont Area
    Posts
    455
    A cheap manometer cost less than fifty dollars. If you work on any equipment which works on natural gas, propane, etc. than you must use some sort of gauge to measure both main gas pressure and manifold pressure. This is not a luxury item nor should it be on your wish list of tools. The bottom line is that if you are servicing this type of equipment, you MUST have some form of tool to measure pressure. If not pack up your tools and work only on equipment your are familiar with. Other peoples lives depend on it.

    I remember around 15 years ago when there was this job at a church which had 6 gas package units on the roof with over 300 ft of gas pipe. Every thing was fine in a part load condition but when it got cold the heat would lock out to just a few units at a time and on any given day different units would lock out.

    Well the previous tech changed some parts that were suspect but nothing worked. Weeks went by and finally and at first glance after looking at the 2" gas line which appeared undersized thought this could be the problem. It was determined that only on a full load there was not enough gas pressure to supply all the units at the same time. One or two would lock out at the rest ran just fine.

    With a simple gauge it was determined that there was only 2" W.C. Only enough for first stage.

    How about the furnace which was over firing and cracked the fire box and caused a flame roll out, and burned all the controls.

    Or the wall furnace over fired and ruptured the fire box.... you get the idea.

  4. #43
    Join Date
    Jun 2012
    Location
    nampa idaho
    Posts
    66
    Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting

  5. #44
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by hkempf View Post
    Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting
    The sand will melt into glass and cause poor signal.

  6. #45
    Join Date
    Jan 2004
    Location
    PA
    Posts
    68,785
    Quote Originally Posted by hkempf View Post
    Mr bill can you tell me why you wouldn't clean a flame sensor with sand paper, I have always seen it done that way and the school I went to did the same, just curious, always wanting to do things the right way, and I've never heard of using a dollar bill, that's interesting
    Scars the surface of the sensor and causes it to corrode quicker.

    Use steel wool or a 3M pad. I use a dollar bill mostly.
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    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  7. #46
    Join Date
    May 2012
    Location
    Upper Michigan
    Posts
    3,589
    Quote Originally Posted by beenthere View Post
    Scars the surface of the sensor and causes it to corrode quicker.

    Use steel wool or a 3M pad. I use a dollar bill mostly.
    Makes sense, I've heard the glass story, ever hear that?

  8. #47
    Join Date
    Jun 2012
    Location
    nampa idaho
    Posts
    66
    That makes sense, it's not actual sandpaper I've been using but a sanding cloth, but I will switch just to be safe, thank you for the advice , I'm always wanting to do things the right way

  9. #48
    Join Date
    Jul 2012
    Location
    Atlanta ga
    Posts
    228
    thank you to the 1 person who help me,i been understood there are alot of negative energy on hvac talk but i ignore it .so i got the burner back but still goes out how do i test the flame sensor rod cleaned it ,its still shut off gas valve after a couple sec

  10. #49
    Join Date
    Jul 2012
    Location
    Atlanta ga
    Posts
    228

    the best way to test electronic flame sensor

    what is the best way to test the flame sensor to understand that it really needs replacing

  11. #50
    Join Date
    Oct 2011
    Location
    Chicagoland Area
    Posts
    4,852
    With your meter.
    The comment you made in the other thread about negative energy is uncalled for. I'm curious why you came back for advice if we are such horrible people.
    Officially, Down for the count

    YOU HAVE TO GET OFF YOUR ASS TO GET ON YOUR FEET

    I know enough to know, I don't know enough
    Liberalism-Ideas so good they mandate them

  12. #51
    Join Date
    Jul 2012
    Location
    Atlanta ga
    Posts
    228

    yep

    Quote Originally Posted by 2sac View Post
    With your meter.
    The comment you made in the other thread about negative energy is uncalled for. I'm curious why you came back for advice if we are such horrible people.
    lol obviously you maybe the negative energy im speaking of but if you are not why speak on it .i didnt here for drama ,i come to surround myself with individual who think like me and learn new things that i will face in the field

  13. #52
    Join Date
    Jul 2012
    Location
    Atlanta ga
    Posts
    228
    ok...my meter huh ....ohm,amps,volts,? during the heating after burners lit ,i put my clamp on meter on it and read like 0.3 give or take 2 amps is this right

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