My AC Sucks, What Should I do?
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  1. #1

    My AC Sucks, What Should I do?

    New to the forum here, looks great! I bought my condo a few years ago and there was a Rheem 9 Classic Heat Pump on the balcony when I moved in. It turns on and off fine, but the pressure of the air coming out seems very low and the air is not very cool. When I got my inspection, the inspector told me the delta temp between air coming out and air coming in was about 10-15 degrees too low when the AC was on. I replaced the filter when I moved in(inside the house) but I'm assuming this thing is OG so the unit itself has gotta be about 22 years old?

    I live in SoCal so I don't use the heat much, but this summer has been insanely hot and still is insanely hot. Can't take it anymore, so I'm wondering if these type of units can be fixed with new freon or should I get a whole new unit? I really don't want a whole new unit and probably won't get one so any ideas about what may be wrong with my current one would be greatly appreciated.

  2. #2
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,343
    If it is cooling then you don't really need a new one.

    You should have a professional review the system to tell you what the actual problem is.

  3. #3
    It isn't cooling very well is the problem, so I should just hire a pro for this?

  4. #4
    Join Date
    Sep 2008
    Location
    Western PA
    Posts
    25,343
    Quote Originally Posted by yourpfpro View Post
    It isn't cooling very well is the problem, so I should just hire a pro for this?
    Well, it IS cooling, just not well.

    Did it used to cool better?

    There are a number of reasons that should be checked for "insufficient cooling" calls. Refrigerant is one of them, but only one.

  5. #5
    Join Date
    Mar 2009
    Location
    Mount Holly, NC
    Posts
    2,990
    airflow, cleanliness, duct leakage, refrigerant pressures and temps, equipment size, structure tightness, insulation compaction/level/quantity. all have equal importance, and all should be checked by a qualified pro to find the problem with the cooling ability.
    The TRUE highest cost system is the system not installed properly...
    The three big summer hearththrobs...
    Mel Gibson
    Dwane Johnson
    The A/C repairman

  6. #6
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,225
    Quote Originally Posted by yourpfpro View Post
    New to the forum here, looks great! I bought my condo a few years ago and there was a Rheem 9 Classic Heat Pump on the balcony when I moved in. ... I replaced the filter when I moved in(inside the house) but I'm assuming this thing is OG so the unit itself has gotta be about 22 years old?

    .. or should I get a whole new unit?
    I don't see a unit as having ANY remaining Life if it's Already 22 years old and the filter is ONLY changed every FEW years.

    Get a new one unit along with a standard Annual Maintenance Agreement [ at least 2 service calls per year].

    With CA electric rates, the electric bill savings ought to be NOTICABLE.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  7. #7
    Join Date
    Jun 2001
    Location
    Moore, Oklahoma, United States
    Posts
    4,136
    A dirty/clogged condenser coil is a common cause for poor cooling.

  8. #8
    Join Date
    Jun 2005
    Location
    SW Wisconsin
    Posts
    4,810
    Quote Originally Posted by yourpfpro View Post
    New to the forum here, looks great! I bought my condo a few years ago and there was a Rheem 9 Classic Heat Pump on the balcony when I moved in.
    It turns on and off fine, but the pressure of the air coming out seems very low and the air is not very cool.
    When I got my inspection, the inspector told me the delta temp between air coming out and air coming in was about 10-15 degrees too low when the AC was on.
    I replaced the filter when I moved in(inside the house) but I'm assuming this thing is OG so the unit itself has gotta be about 22 years old?

    I live in SoCal so I don't use the heat much, but this summer has been insanely hot and still is insanely hot. Can't take it anymore, so I'm wondering if these type of units can be fixed with new freon or should I get a whole new unit? I really don't want a whole new unit and probably won't get one so any ideas about what may be wrong with my current one would be greatly appreciated.
    Turn the power off to the indoor furnace & the outdoor condenser; then wash out the condenser coils & fins, be very careful to not bend the fins by too high a water pressure &not keeping the stream in-line with the fins.

    Also, while all the power is off, if you feel fully competent to do these things, check the indoor blower wheel blades for lint buildup, if filled with lint the evaporator coil will also be insulated & partially plugged. I advise using an HVAC Tech for doing that job right & cleaning the blower blades.

    After the condenser has dried out do a test on the system to see if it cools better; if not enough better - I'd take the following temps.

    All U need is a good thermometer (digital reading in tenths preferable) and an indoor Humidity Gauge

    1) Helpful; Tonnage & SEER of Unit &/or outdoor condenser model number: Minimum SEER upped to 10-SEER in 1987; upped to 13-SEER in 2006

    2) TXV or, orifice metering device? _______. Only if U know…

    3) Outdoor condenser’s discharge-air-temperature ______-F
    Subtract Outdoor air temperature: _______
    Outdoor Condenser Air-Temp-Split _______

    4) Need the ‘Indoor’ percent of relative humidity - in the middle of the rooms or, at Return-Air inlet grilles ___

    5) Indoor Return-Air Temperature ______
    Subtract Indoor Supply-Air Temperature ______ -F
    Indoor temperature-split _______-F

    What type of filters are you using pleated or cheap fiber glass; also filter area(s) in sq.ins. _____________ ________________

    Use a "Reply with Quote," then just fill-in all the temps & the indoor humidity.

    You'll have to call a contractor to get the problems fixed, however, you'll have some clues to guide you plus some ideas as to what to ask the TECH about. It's up to you...might save you some money getting it done Right when the tech comes out...?
    Last edited by udarrell; 09-13-2012 at 11:51 AM. Reason: Save on getting it done right...

  9. #9
    Join Date
    Jul 2012
    Location
    Western KY
    Posts
    1,221
    Quote Originally Posted by yourpfpro View Post
    It isn't cooling very well is the problem, so I should just hire a pro for this?
    Yes. No need to replace a 20 year old car cause of a flat tire if it still runs good rite? Same deal here. If you don't know why it's not cooling well you don't know if it needs to be replaced. Replacement can be very expensive. A good cleaning $$$$ and may get her going agin. Don't recommend putting the tools to it yourself, can get you hurt or killed. Good luck.
    Last edited by jpsmith1cm; 09-13-2012 at 08:12 PM. Reason: Pricing

  10. #10
    Join Date
    Dec 2005
    Posts
    1,901
    The "man" does not wanna spend the money to get comfort.
    He wants free service and that is why he is in this forum

    Don't wanna buy a new unit. But at least spend the $$ to have it fixed.

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