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-   -   GMT/GMTH (Goodman) Delayed start (https://www.askmehelpdesk.com/showthread.php?t=444482)

  • Feb 8, 2010, 04:58 AM
    tahnoak
    GMT/GMTH (Goodman) Delayed start
    I am hearing several "thumping" noises in the ventilation when my GMT or GMTH is trying to start. The unit is roughly 6 years old and I have never had a problem with it until now.

    It thumps maybe 7-10 times then it kicks on and starts working.

    Thoughts?

    Thanks.
  • Feb 8, 2010, 06:14 AM
    hvac1000
    Need EXACT model number
  • Feb 8, 2010, 08:02 AM
    tahnoak

    According to the faceplate the model # is: U36 Rev B
  • Feb 8, 2010, 11:30 AM
    hvac1000
    No cigar. Try looking behind the furnace door on the front of the furnace. In other words remove door and look for the furnace rate plate.

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