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  1. #1
    Join Date
    Jul 2005
    Posts
    5

    Question

    Some one please help!! ok here it goes....
    I closed on my brand new two story home 2 weeks ago. its 2200 sq ft. with a 1 AC unit with a 10 seer rating and a 2 damper system. i have 1 thermostat upstairs and 1 downstairs. I questioned the builder before the install and asked if i was going to have 2 AC units. He said no, this 2 damper system is great and will cool your home fine. I stupidly agreed and now i am hot. I had the HVAC people come out twice that installed it and they said its working fine.
    Before my wife and i moved in we came in on a saturday to paint a room in the downstairs area. it was 76 degrees in the home. i set the AC on 72. When we left 7 hours later, with the AC running the whole time we were there it was 77 when we left. That doesnt seem right to me??? This is my first two story home so i dont know how this damper thing works. Does that sound right to you? It has been mid 90's to 100 here in SC lately. Maybe thats got something to do with it?
    Last night at 9:30pm my upstairs thermostat read 80 degrees?!? it was set at 72. i cannot sleep in that kind of heat. when i woke up today i looked at it and it did get to 72 but it probably ran all night long. My first power bill will probably be really high. The new electric company will love me i bet.
    One more thing...
    Before i closed the building contractor had some ladies in the home cleaning it up before i did my walk thru. he said he came in the home one a.m. and it was freezing in the house. he said the thermostats were set to 58 degrees. He said the cleaning ladies must have set it low to cool off while they were cleaning and didnt set it back up. He said it must have been running for two days straight to get that cool. Would this have messed up my unit-system in anyway? I myself had never seen the thermostat get below 72. i dont believe it can get down to 58.
    What should i do? I plan on writing a letter to the companies manager/president that built my home and tell them the whole story. Would a bigger AC unit with better seer help me? I feel i was mis-lead by my builder. Need some direction on what action to do next.

    Thanks for your help.

    ~MIKE

  2. #2
    Join Date
    Aug 2002
    Location
    Southold.calm
    Posts
    6,052
    Mike

    First click on the bull’s eye on top and do your own heat load calc. Then we need the make and model # of your equipment.

    As far as Zoning is concerned, it has been around for many years and works fine if installed properly, That also goes for the entire system.

    I would have a factory rep come out to double check the instillation. You will have to pay for this service but it is well worth it.

    If any monies were held in escrow at the closing then have your attorney contact the builder and express your concern. Don’t release these funds until you are satisfied.

    Congrats on your new house and good luck

    Paul

  3. #3
    Join Date
    May 2002
    Location
    Colorado
    Posts
    697
    Probably another improperly charged builder-grade system without a TXV or with low air flow.

    Mike,

    What happens to the relative humidity in the house when the system runs for several hours? RH can be a pretty good indicator of air flow problems.

  4. #4
    Join Date
    Nov 2002
    Posts
    230
    In my experience the upstairs carries the full heat load of the house during summer. To compensate, the zoning system ductwork is critical and needs to be able to handle the shifting loads between summer and winter I.E. the ductwork should be sized to handle 80-100% of full system capacity in each zone. I've seen more than a few duct layouts that were sized too small and the ducts restricted the CFM in the higher demand zone (mainly upstairs in summer). The layout seemed to be balanced in the CFM per room under design conditions but upstairs carries a much greater load from all the downstairs plus the attic in summer.
    This is stating the obvious but two story houses in high heat/humidity areas are tricky when you try to install price competitive systems.

  5. #5
    Join Date
    Jul 2005
    Posts
    5

    hey panama what is...

    what is TXV?

  6. #6
    Join Date
    Jul 2004
    Posts
    322
    I had an inspection after I closed on my new house (my mistake) and he said the units were undersized and weren't working properly. The builder's response was that right before we moved in the cleaning crew was there and it was freezing. In hindsight that was total baloney. However, he did say that getting window treatments up would help and he was right. Do you have all your curtains/blinds up? Also, it would help if you go look at the model # on the outside unit and tell us what it is. That would give the pros here some clue of what you have.

  7. #7
    Join Date
    May 2002
    Location
    Colorado
    Posts
    697

    Re: hey panama what is...

    Originally posted by muk33
    what is TXV?
    A thermostatic expansion valve. A TXV adjusts the flow of refrigerant according to the cooling load. They also compensate pretty well for charging errors. Without a TXV small charging errors can reduce cooling capacity significantly. They add a couple hundred bucks to the cost of a system, and so builders don't like to pay for them.

  8. #8
    Join Date
    Jul 2005
    Posts
    5

    Lightbulb Model # for my unit

    Here is the info for my ac unit:

    BRAND: Goodman
    Model#: CKL42-1L
    SER #: 0411487628
    AC VOLTS: 208/230
    VOLTAGE RANGE: MIN 197 MAX 253

    i hope that help answer some of my questions

    thanks again
    MIKE

  9. #9
    Join Date
    Jul 2004
    Posts
    322
    It could be a lot of things. Looks like you have a 3.5 ton, which might be sized correctly. Maybe a problem with ducts, dampers, AC installation and settings, attic ventilation, etc. But 80 upstairs at 9:30 p.m. is unacceptable and the builder knows that.

  10. #10
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Check the attic to be sure it's fully insulated,I've seen areas without insulation,in new homes.

  11. #11
    Join Date
    Dec 2002
    Location
    Houston,Tx.
    Posts
    16,106
    Originally posted by muk33
    Some one please help!! ok here it goes....
    I closed on my brand new two story home 2 weeks ago.
    ~MIKE

    SER #: 0411487628 Two weeks ago with that Ser. #?
    __________________________________________________ _______________________
    “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

  12. #12
    Join Date
    May 2002
    Location
    Colorado
    Posts
    697
    Now there's a builder who really knows how to save money!

  13. #13
    Join Date
    Jul 2005
    Posts
    5

    Unhappy Question for mrbillpro

    mr. bill pro...whats that mean about my ser # and only 2 weeks???? Is that an older unit or something?

    thanks
    MIKE

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