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Thread: Lennox Package Unit Model# TGA120S2BH1Y (Gas Heat) NO HEAT

  1. #1
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    Lennox Package Unit Model# TGA120S2BH1Y (Gas Heat) NO HEAT

    My partner went on a service call for this unit because the heat wouldn't come on. It has 2 boards on it and the board with the indicator light is blinking 3 times. On the unit, it says that if the light is blinking 3 times is is usually flame overthrow but he checked it and it checked out ok. He has ordered a new board but we are hoping someone has info or troubleshooting advice on this unit. We're not too familiar with Lennox units.

  2. #2
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    What is flame overthrow?
    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
    Why is it that those who complain the most contribute the least?
    MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING

  3. #3
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    I think it is rollout. Does that have the manual-reset rollout in it. Where the terminals corroded and not making a good connection?

  4. #4
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    If that's the case, there is much more that needs to be checked
    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
    Why is it that those who complain the most contribute the least?
    MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING

  5. #5
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    flame what...... never heard of the term in all my life..... good luck .......
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  6. #6
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    Quote Originally Posted by carmon View Post
    flame what...... never heard of the term in all my life..... good luck .......

    Overthrow
    http://youtu.be/D9DkciMTsLI
    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
    Why is it that those who complain the most contribute the least?
    MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING

  7. #7
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    oh now I get it .....
    it was working.... played with it.... now its broke.... whats the going hourly rate for HVAC repair

  8. #8
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    Quote Originally Posted by starkey View Post
    It has 2 boards on it and the board with the indicator light is blinking 3 times. On the unit, it says that if the light is blinking 3 times is is usually flame overthrow but he checked it and it checked out ok.
    The 3 flash code - Flame Rollout Switch Open or Prove Switch Open or Closed.

    The Flame Rollout is a 290ºf (+/- 12ºf ), manual reset switch.

    The Combustion Air Prove Switch closes on negative pressure fall, showing the inducer motor is up to speed before allowing the ignition sequence to continue.

    Did you have the door/panel back on burner compartment when you were testing?

    Did you do any testing of the combustion blower or it's capacitor?

    Sorry, but I don't post manuals in this "OPEN" forum.
    Instead of learning the tricks of the trade, learn the trade.

  9. #9
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    I always check the circuit path from the molex plug connection(s), just because the roll out is closed doesn't mean it's finishing

  10. #10
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    We don't discuss step by step diagnostics in the open forums. Get your post count up to 15 and apply for pro membership, so we can deal with your questions in the restricted access Pro forums.

    Even the T series has a wiring diagram. I would follow it and everything should be clear. What is the serial number?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

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  11. #11
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    hell, he's a one & done, apparently didn't get the answer they wanted.

    and I'm a little concerned about the "partner" thing?????
    It`s better to be silent and thought the fool; than speak and remove all doubt.

  12. #12
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    Quote Originally Posted by dandyme View Post
    and I'm a little concerned about the "partner" thing?????
    I don't think Louisiana is one of "those" states...
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist
    Member, IAEI

    AOP Forum Rules:







  13. #13
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    Quote Originally Posted by timebuilder View Post
    I don't think Louisiana is one of "those" states...
    In Loozy they call them "Pardners"
    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
    Why is it that those who complain the most contribute the least?
    MONEY CAN'T BUY HAPPINESS. POVERTY CAN'T BUY ANYTHING

  14. #14
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    Flame roll out, change the board. Imagine if all mechanics did the same!

  15. #15
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    Quote Originally Posted by GastecD View Post
    Flame roll out, change the board. Imagine if all mechanics did the same!
    Cmon now youre supposed to sell them a new ventor motor assembly, rollout, and upper and lower high limits to go with it HAHA.

    I so know whats wrong with it...but....open forum.
    Get money, get paid.

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