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  1. #1
    Join Date
    Mar 2012
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    Amer. Std. Heritage 15 Metallic Noise

    I had a new Amer. Std. Heritage 15 2.5T heat pump with a TAM 7 air handler installed in the summer and it was super quiet. I turned the heat on for the first time about a week ago and now when it runs in heat mode I hear metallic sound that seems to be resonating through the line set. The air handler is in the basement and I can really hear it down there. It definitely is not coming from the TAM 7 air handler. The heat pump is working fine. I just want to make sure that is normal operation for this brand. My old York heat pump sounded the same in heat or cool mode. Thanks for all that reply!

  2. #2
    Join Date
    May 2000
    Indianapolis, IN, USA
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    Sounds like maybe a check valve or something. Probably ought to have the dealer check it out. Doesn't sound critical.

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