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white_unicorn

AC on 2nd floor..very weak

white_unicorn
June 11, 2019

2 story house. heater and AC very weak on second floor. first floor works great. high ceiling on second floor. got someone to look at it. and the answer was it is normal. is it normal? if not, what might be the issue? should i get a second opinion?

Comments (12)

  • mike_home

    This is a common problem with two story houses, but it is not normal. Is the furnace located in the basement?

    The duct work to the second floor is not large enough to carry the air flow, or it could have a major leak. Unfortunately this usually means having to open up walls or floors.

    You could try closing some of the vents on the first floor to attempt the balance the air flow. Start with one or two vents that have the strongest air flow and are closest to the furnace. It is not the perfect solution but it may help.

  • white_unicorn

    thanks. the vent is on second floor.

  • white_unicorn

    the furnace is on second floor

  • mike_home

    If the furnace is on the second floor, then the air flow should be better than on the first floor. It sounds like you have a disconnected duct on the second floor. Do the duct run in the attic, and if so are they visible?

    You need to get a second opinion.

  • dva79

    What is the temperature difference between floors?

  • PRO
    HALLETT & Co.

    Do you have one system or two?

  • remodeling1840

    Get a better professional to look at it. When we bought our present house, we used the hvac company the seller recommended. What a mistake! He used the wrong size filter (too small!) which voids the warranty. He didn’t retape ducts that were obviously pulled apart. AC was pouring cold air into our attic! He never checked the lines for leaks. His boss didn’t return our three phone calls. After a visit to get a refund, my husband called a second company which has given us excellent service. We did get the refund from the first company.

  • white_unicorn

    we have one system

  • PRO
    HALLETT & Co.

    if you have one system and some areas have good pressure, the machine is working correctly. Unfortunately it sounds like the ducts aren't run in a way that gives the best pressure on the second floor. The ducts can be hard to alter unless you have attic access. Sometimes it is possible to zone an existing system so the one air handler can serve the different needs of the first and second floor more efficiently. That can be a costly change in an existing house unfortunately.

  • SaltiDawg

    Do you have insulation in the attic above your 2nd floor?

    Are the ducts for the 2nd floor run thru the attic?

  • kevinande

    It sounds as if you may have a malfunctioning damper system or leaky duct work.

  • SaltiDawg

    Or...

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