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    Heat Pump- High Pitch Noise in Heat Mode

    Hey gang-

    Two months ago we had a new Carrier Heat Pump system installed. We have just now switched to the heating season here in Atlanta and noticed something strange.

    The outside unit (a...
  2. Yes- Single Stage Heat Pump, Variable Speed Air...

    Yes- Single Stage Heat Pump, Variable Speed Air Handler. I'm convinced the Air Handler is only running in high-blow and that is the issue I will pursue with the installer.

    I'll post what I...
  3. Thanks! So initially it would always come on in...

    Thanks! So initially it would always come on in "hi blow"?

    Any thoughts on where else to look to see if Variable Speed might be disabled? I strongly suspect that Thermidistat Option 41 might...
  4. Variable Speed Air Handler only runs in hi-blow?

    Hey gang-

    We just got a new Carrier Heat Pump (25HCC5) and Variable Speed Air Handler (FV4C). Professionally installed with the Carrier Programmable Edge Thermidistat.

    Our initial observation...
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