A/C question, Not blowing hard enough to cool house, but cold enough air is comming out?

Question

I guess this a multi question question. I am renting a house & i have a 1 year old a/c system. Quick problem, a/c dosent cool house corectly. I have a thermometer & the air comming out of the vent gets to about 62-64, but it dosent blow hard enough to cool the house. The unit is the right size to cool off the house. Last night it was 83 outside & 82 inside while the air had been runnign for 6+ hours? I havent gotten a chance to check the insulation in my house, but when i turned the air on it was only 79 in the house, around 2pm, by 8pm it was still 82 in the house. I have read online that you can change the speed setting for the blower, but where is that located? On the system outside or inside the house? Also it isnt the filter i change that the day we moved in just to be safe. I have been reading a lot about cleaning the system & nothing seems to help. What else can i do since i know the air is cold enough just not blowing very hard?

Answer 1

I'm no expert but I have a 50-60 year old house I've been working on for 2 years. I would start to eliminate stuff that could be wrong or right.  I wouldn't suspect insulation but poor venting in the attic is counter productive to cooling your house.  Cleaning the intakes in my house helped both heating and cooling my house.  Cleaning could be as easy as reaching in as far as you can with a brush. The professional cleaner guys...well I have my opinions. Change your air filter every month regaurdless of what you think.  Its not that much money to replace.  See if you can gain access to the fan see if it blows.  Get a programmable thermostat if don't have one, that was a big deal for my house.  What I also found out was that some vents in my house were too big while some were too small for the space it supplied air to.  The bath vent was 10x10 while the bedroon was 3x10 inches.  Crazy I know.  Good luck working this out.  You seem smart you'll get it.

Answer 2

Keep all your blinds closed and try to keep as many lights off as possible. I'm not sure if it is a portable unit or not. If it is then try putting a pan infront of the vent, if it isn't then I would have your furnace fans checked to ensure that they are working properly. If all that isn't working well then have the HVAC guys come and check all your ducting to make sure there is no major leakage somewhere in the ducts, good luck.

Answer 3

Actually the air coming out of the vents should be much colder than 62-64 degrees.  You need to call a HVAC repairman and get the unit checked out, or it might possibly still be under a warranty.  Check with your landlord and inform him/her of the problem.  The maintenance on the house and the heating/cooling system is his, not yours, unless you have agreed to maintain everything.

Answer 4

I bet she's froze up.Run the fan only for 30 minutes to check this.This will melt the frost or ice.If she's running continuously she could be low of refrigerant.

That will freeze the coil and make it run all the time and not cool.

Answer 5

Have you cleaned the evap.coils (at least once a year) and changed filters once a month?The air coming out should be below 50' if properly charged.Blower spead changes usualy require a wireing option change.

Answer 6

The air should be between 38 and 48 degrees coming out of the vents.You have a system failure.

Answer 7

diffently sounds like the fan is not blowing hard enough.   Not all blower units have multi speeds    Lock at your fan motor located in your air handler,   if it has 4 wires  typically  yellow, red, black and white,  you have a three speed   those wires should plug into a board,  depending on what termial there pluged into will decide the speed.     If your fan motor has only a white and black there is no adjustment and  I have seen it where the fan motor is not capible of handling the load needed for air conditioning  such as horsepower.  Now a new air handler may even have dip switches to control the speed  they can get really confusing if your not familiar with the equipment.   My advise is to look at the wires on the fan motor and see where they go on the board.  it will say on the wire diagram what wires are what speed and make sure they are on the termial marked for cool.   If that don;t work you will need to call out a tech...    I woud also like to add if you have a 30 degree differnce from your return grill to the air exiting the regesters.  the refrigeration system is working correctly,  high amounts of humidity will also cause that number to be less then 30

Answer 8

There is a fan setting inside the unit and if power has ever been cut off to the a/c unit, it might have re-set itself to the lowest fan speed.  It is usually located in the unit outside.  Don't let someone charge you some ridiculus amount to change the setting.

Answer 9

could be a few things,

check fan motor,it could be faulty and about to fail

check gas charge

check the evapourator coil as it may be dirty or blocked

the fan speed setting should be on the control ,that should be in the house.

basically you have an air flow problem and not a refrigeration problem,its going to be a faulty fan motor ,wrong setting on control or dirty/blocked evapourator coil