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  1. #1
    Join Date
    Jan 2005
    Posts
    3

    Unhappy

    I have a Lennox G51MP furnace. Just built this house last year and the furnace was installed in November, 3 months ago.

    Last night, it was 0 degrees out. When my wife woke up me for work, she said "its feezing". When I went down stairs, the thermostat said 51. The furnace obviously shut off in the middle of the night. And, my wife babysits a 3 month old everymorning.

    Luckily, I put a set of gas logs in when I built my house, so I quickly got them burning and within an hour the living room was toasty.

    I got out my manual from lennox and read the trouble shooting guide.

    When the furnace first comes on, both the Red and Green LEDs blink fast, which the manual indicates as normal operation.

    It goes through this cycle and then attempts to light... You see the pilot light come on, then a flame, then the flame goes out.

    It does this seeral times for about 3-4 minutes then finally shuts down altogether.

    Now, A different code come up. Alternating slow flashing red and green. The manua indicates the follwing.

    "Watchguard-Burners failed to ignite, limit open longer than 3 minutes, or flame sense lost 5 times in one heating cycle."

    Can anybody tell me what I need to do to fix it????

    Is there a part that is malfunctioning?

    Please, if you know the cause of this, give me some advice.

    My furnace guy is out of town until monday.

    Thanks,
    Mike

  2. #2
    Join Date
    May 2004
    Posts
    1,462
    Sounds like it is not proving the flame. Find another heating guy, at least for this time.
    If all else fails....Try reading the directions!

    Tell it like it is and let the chips fall where they may.

    Any views or opinions stated here are strictly my own.


  3. #3
    Join Date
    Jan 2005
    Posts
    3
    what does "not proving the flame" mean?

    Thanks,
    Mike

  4. #4
    Join Date
    May 2004
    Posts
    1,462
    The furnace control board has to sense that there is a flame present when it opens the gas valve. If it does not sense this flame it will shut the gas valve so that it is not filling the furnace with raw gas ( so no explosion and fire will occur). From what you describe, your furnace is not sensing the flame. This is not something that you can remedy, it must be done by someone who is knowledgeable about the furnace. If your furnace is 3 months old then it should still be in warranty, call the installer. If it is a small shop, as your previoud post implies, then surely he has some arrangement for a back up to cover his calls. If not, then maybe you picked the wrong contractor. Either way, you will have to find someone to repair the furnace or it will get mighty cold between now and Monday.
    If all else fails....Try reading the directions!

    Tell it like it is and let the chips fall where they may.

    Any views or opinions stated here are strictly my own.


  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,108
    Check uyour exhaust pipe for ice, if it is restricting, it can also cause the same symtom.
    Contractor locator map

    How-to-apply-for-Professional

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

  6. #6
    Join Date
    Nov 2001
    Location
    east kansas
    Posts
    8,032
    The Watchguard code is a joke. Sends you on a wild goose chase when pressure switch short cycles.

  7. #7
    Join Date
    Jan 2005
    Posts
    56
    You can try shutting the power to the furnace off for a few minutes , then try to run it again.

  8. #8
    Join Date
    Jan 2005
    Posts
    2
    Good call Plain Spoken. There are a few items that should be looked over with that code you mentioned. If your service tech you normaly use it out of town you may contact your local gas supplier. They should have a staff available 24 hours a day. Typically if your unit is only 3 months old it will have a warranty active yet.

  9. #9
    Join Date
    Jan 2005
    Posts
    3
    booshay,

    My father is coming to take a look at it today. He isnt licensed, but knows a good bit about furnaces.

    What are the things I should tell him to look for?

    Thanks,
    Mike

  10. #10
    Join Date
    Jan 2005
    Posts
    2

    Smile

    Honestly. Look in the local phone book and have a service tech address the problem. The tools required to properly diagnose some of the situations that occur on a GAS burning appliance do not always come in a serviceman's canvas bag, but thru adequate training in the profession. Feel free to email me. My email is posted on my credentials link.

  11. #11
    Join Date
    Dec 2004
    Location
    Derby City
    Posts
    3,964
    FINALLY, someone in this thread makes the CORRECT recommendation. If his normal service provider is not available, STILL ALL A PROFESSIONAL. Suggestions such as turning the power off and back on to possibly reset a safety is okay, but where do we draw the line at making service suggestions to a HO? Very slippery slope here guys! I can certainly sympathize with the HO in a case like this, no heat, newborn, etc. but when are we going to draw the line in trying to service these things over the net? We are so anxious to "display our knowledge" that we overstep the limits of what we can responsibly do in a case like this. It sounds like the installing contractor is a one man show. Surprised if that is the case and he is a Lennox Dealer (I know they like their fair market share.) Did anyone tell this person that the service codes on the board are for the benefit of the service tech to assist him in troubleshooting and repairing the unit? I try to limit HO's to changing filters whenever possible, and as we have learned sometimes that's not even safe to do!

  12. #12
    Join Date
    Dec 2004
    Location
    Derby City
    Posts
    3,964
    FINALLY, someone in this thread makes the CORRECT recommendation. If his normal service provider is not available, STILL CALL A PROFESSIONAL. Suggestions such as turning the power off and back on to possibly reset a safety is okay, but where do we draw the line at making service suggestions to a HO? Very slippery slope here guys! I can certainly sympathize with the HO in a case like this, no heat, newborn, etc. but when are we going to draw the line in trying to service these things over the net? We are so anxious to "display our knowledge" that we overstep the limits of what we can responsibly do in a case like this. It sounds like the installing contractor is a one man show. Surprised if that is the case and he is a Lennox Dealer (I know they like their fair market share.) Did anyone tell this person that the service codes on the board are for the benefit of the service tech to assist him in troubleshooting and repairing the unit? I try to limit HO's to changing filters whenever possible, and as we have learned sometimes that's not even safe to do!

  13. #13
    Join Date
    Feb 2004
    Posts
    2,597
    damn, it's only 2:00 p.m. and i'm already seeing double.

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