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  • Noob need hlp with home ac

    Just bought a new home.
    I am unhappy with the A/C system.
    The A/C contactor that installed it is of no help.

    I would like two things:
    1] If it is not against the forums rules...Recommendations
    For a honest Local Tech That KNOWS what he is doing in
    the Jacksonville Fl area to do a Manual J as well as to
    Checkout the systems performance & wiring

    2] Confirmation that I an not crazy...
    The home is 3200Sq, two story. Uptairs is a 3.5 ton Lennoz 12 seer zonned to the upstairs & downstairs bedrooms. The rest of the house downstairs is on a 2.5 ton lennox 12 seer.

    Outside temp all this week has been a high of 92-94, low of 84-86. The downstairs unit runs from 9 am to 11 pm nonstop and can NOT maintain 77. In fact it will go as high as 81.
    The humidity sensor reads high of 55 lo of 46. If I run it alone or along with the upstairs sytem this does not change.

    It is not so much that it is costing me ALOT of $ to run this but that we are uncomfortable and doing so.

    I have some basic A/C skills and as such am sure that there are no leaks in the duct work (but not if they are the right size), filters are new, evap & cond coils clean and unobstructed.

    Also I have hard specs on the system:
    Low side PSI = 69 Line temp* = 64 Chart Temp = 40.5
    High side PSI= 265 Line temp* = 93 Chart Temp = 121
    *Temp was optained using Infrared Thermometer
    Outside temp was 90
    Inside temp was 78
    Temp differential at airhandler 20.5

    I welcome anyone who can offer suggestions to do so.
    thank you.
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