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-   -   G40UHX Lenox gas furnace not working (https://www.askmehelpdesk.com/showthread.php?t=417008)

  • Nov 17, 2009, 09:57 PM
    elahi101
    G40UHX Lenox gas furnace not working
    My LENOX gas furnace Model: G40UHX series does not work at all.

    I tried to start the furnace the main Blower kicks in.

    The Small blower does not run and Fire is not lit in ignite.

    The Air Condition Cooling unit is working.

    The Xformer has 27VAC output.

    Any body suggest what to chek and why?
  • Nov 17, 2009, 10:20 PM
    elahi101

    Also from Observation:

    The #2, #3 & #4 does not operate, what should Ilook for.

    when start set to call for heat it should be:

    1st ==within few second later the bigger/main blower should come on,blowing heat into the house
    2nd==the inducer motor comes on
    3rd ==after a few seconds the igniter should glow a pretty bright orange
    4th ==the gas valve open and burners fire up
    these steps are done in sequence 1-2-3rd-4th
  • Nov 18, 2009, 11:11 AM
    KC13
    Was the thermostat replaced since last heating season? If the circulating blower turns on first, the thermostat may not be configured for gas heating. Look on the back for a switch marked "E/F" or "E/G". If present, it should be set to "F" or "G".
  • Nov 18, 2009, 04:25 PM
    hvac1000
    Here is a complete service/parts manual for your unit. I suggest you keep a copy on your computer.

    http://0190acd.netsolhost.com/manuals/G40UH_Series.pdf

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