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    dellav's Avatar
    dellav Posts: 2, Reputation: 1
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    #1

    Mar 15, 2007, 09:40 AM
    Rheem 90 plus furnace
    Installed in 2004. Just before the fan comes on the furnace bangs/clunks - sound like someone hitting pipes with a wrench. We have had trouble with ignition. Could this be related? If not, any answers?
    NorthernHeat's Avatar
    NorthernHeat Posts: 1,455, Reputation: 132
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    #2

    Mar 16, 2007, 01:41 PM
    Could be simply a duct expanding or contracting causing the pop noise. I have very few ignition problems with that year Rheem. It is also posible the blower wheel is not adjusted right or loose. Furnace has a 5 year part warranty. Go to the furnace and put your hands on the ducts as the blower turns on to see if that isn't the cause.
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