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Question: Why do i have low air flow from my central heat/AC vents?


Question by eight_kinds_of_hell_454: Why do i have low air flow from my central heat/AC vents?
Just bought a house I am a first time home buyer. House has a new central AC unit or is supposed to, but the RPJ heat exchanger is old (says it was made in 91). The vent closest to the unit has air coming out decently but the rest of them don’t blow as hard. Is there a way to change the fan speed on this unit? Or do i have another problem?

Best answer:

Answer by Barney
Have you tried a new air filter yet? It should be changed once a month for maximum efficiency

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3 Responses to Question: Why do i have low air flow from my central heat/AC vents?

  1. missourian

    it is possible that the wires on the fan motor were connected wrong, A/C requires more fan speed than Heat, since cold air is heavier, the wire speed diagram should be on the motor telling you the rpm each wire controls….just a thought

  2. nycareerpro

    Sometimes you have to open the other vents up more- the air gets distributed in some of the central air systems. Your vents and ducts may need to be cleaned out though and this is what is causing the low air flow.

    If you have still have problems or need a duct cleaning and are in the NJ area, check out Browns Heating & Cooling. They are affordable and extremely reliable.

  3. thenemo-man

    Many builders used pipes to small for proper A/C And later on A/C installers don’t put in larger pipes because of the rehab cost.
    Possible it was just a bend that has a clog-age
    Good Luck.
    PS: Your A/C person should have explained that to you first.

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