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  1. #1
    Join Date
    Apr 2005
    Posts
    1

    Confused

    We just bought a house that is only 2 years old with Trane Dual Heat Pumps. Just this morning, we turned on the heat (it had been shut off for the night) and it starting making this hissing noise very loudly out of one vent. I walked in the other rooms and I can't really hear it - it sounds like it is coming out of one vent only.

    Any ideas of what it could be?

    Thanks!
    James

  2. #2
    Join Date
    Jun 2001
    Location
    Louisville, KY
    Posts
    12,189
    a snake?

  3. #3
    Join Date
    Sep 2004
    Location
    Portage
    Posts
    909
    pissed off movie goer??
    I don’t always drink beer, but when I do I prefer Dos-Equis. I am the most interesting man in the world. Stay thirsty my friends.

  4. #4
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,080
    Hissing sound? like water running? could be the line set is running close to that vent and you are just thinking it's coming from the vent. If you can get to that duct easy going to the room were the hissing sound is coming from see if the copper line that runs to the outside unit is close by.
    __________________________________________________ _______________________
    “Experience is a hard teacher because she gives the test first, the lesson afterwards". - Vernon Law

    "Never let success go to your head, and never let failure go to your heart". - Unknown

  5. #5
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,358
    Is the damper on that one register that's "hissing" all the way closed? I've heard supply registers both "whistle" and "hiss". Flip open the damper louvers on the register all the way and see if the hissing stops.

    Otherwise, check for snakes.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  6. #6
    Join Date
    Feb 2005
    Location
    Alabama
    Posts
    534
    Too much airflow, high velocity. register blades closed or partly closed. Where is the "hissing" vent in relation to the air handler?
    "If you can't fix it, don't break it."

  7. #7
    Join Date
    Apr 2005
    Posts
    2
    possible refrigerate leaking (slow leak) have it check up in attic

  8. #8
    Join Date
    Jul 2004
    Location
    West TN
    Posts
    983
    Did it start hissing shortly after putting a nail in the wall to hang a picture?
    Extend to others the grace that God has given you.

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