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Our Home A/C is blowing warm air???

It usually does fine it has never done this in the three years we've lived here. The thermostat says its 80 degrees in the house and i am real concerned because we have a baby and two small boys. Does anyone know what could be causing it. The filter is only a month old and its one of those three month ones. We can't afford anyone to look at it, i am about to cry. We have 100 degree days here, and i don't know what to do? Ladies if you know what might be wrong please let me know. Also, on the thermostat it has a fan option with an auto or on setting. It has always been on auto. What's the fan for? Do i need to turn it to on? Thank.


Asked by Momofboys22 at 11:21 PM on Aug. 9, 2010 in Home & Garden

Level 16 (2,855 Credits)
This question is closed.
Answers (21)
  • Our central air unit did the exact same thing this year.

    Check the outside unit for iced over lines. If the lines are iced you will need to shut off your unit and wait for the line to thaw.
    -Sometimes this will solve the problem.
    If the lines are iced over and letting them thaw doesn't solve the problem (good chance it won't) it means the unit needs charged with coolant.
    We just had this done and luckily the coolant used in central air units is the same as what is used on refrigerated trailers for trucking and my dh works at a truckline so they let us buy the pound of coolant from them and his coworker did it for us after work.

    BTW central air units all eventually need the coolant charged it doesn't mean you have a leak it's just like the coolant for your car it will eventually run out.

    Keep it on Auto when it is working that is the proper setting to have it turn on and off by temperature set by your thermostat.

    Answer by kfroz0415 at 2:21 PM on Aug. 10, 2010

  • might be out of freon, normally doesn't happen but if it had a leak you didn't know about it could be out.

    Answer by DarkFaery131 at 11:24 PM on Aug. 9, 2010

  • Isn't that fun!? This just happened to us in our brand new house with a brand new air conditioner! The problem: Our air conditioner was frozen inside!!! Wth? Well, I guess if your air conditioner is set 20 degrees lower than the temperature outside it can do this. Solution: Turn off the air and wait until it thaws. Not sure if this is what's going on with yours, but you could try it. My husband looked inside of ours and saw all of the ice.
    It took one night to let it thaw. This is unfortunate on a hot hot day. Good luck!!

    Answer by theutilitarian at 11:26 PM on Aug. 9, 2010

  • no you should leave it in the auto position that way it doesnt run your light bill up..with it on fan it runs continuously..ok first off is the unit frozen over with ice etc? If it is you will have to shut the unit off and let it thaw..if your unit is not one that could freeze over you could have a fried switch board that could or worn out or have been caused by a storm...or it could have a freon leak which you would have to get it gassed back up by a pro...there are so many things to help until you get it fixed..try opening some windows and puttin a box fan in to at least have some kind of air sorry you are having such a hard time...

    Answer by jorjiegirl at 11:26 PM on Aug. 9, 2010

  • The fan just blows air, nothing to do with the cooling. If you have it on cool and it's blowing hot air, it could be any number of things, but something probably needs to be replaced. The last time ours went out, a dog had chewed the outside wiring and that had to be replaced. Before that, we had the motor in our window unit go out. I really don't know anyway to fix it but have someone look at it. Sorry.

    Answer by montanagal2005 at 11:26 PM on Aug. 9, 2010

  • there are a number of things that can be going wrong - ours recently did that - the pipes froze over - go look at them outside where they go from the unit into the house. in our case, it was a $20 part that got a small stone stuck in it and burned it out. but really it could be sooooo many things... there is a site called that has been incredibly helpful to me regarding recent refrigerator problems - not sure if they address AC on there or not but check it out. also, check with your city and county to see if they have any sort of assistance programs for AC repairs... i know i recently saw something in my area maybe under the housing department? also, contact local church / charity - they may have people who are willing to take care of your ac for little to no cost

    Answer by figaro8895 at 11:26 PM on Aug. 9, 2010

  • The fan is just that, a fan. It could be frozen up. I don't know where you live but if it is cooler than 80 degrees outside I would suggest opening all your windows. If you own the house, you need to call someone in the morning to have it serviced. Air conditioners are not typically an item that you can just "fix yourself". I know it's expensive but I don't think it's an option. Maybe somebody would let you make payments.

    Answer by emilex at 11:26 PM on Aug. 9, 2010

  • Check the big thing outside and see if it's frozen. If it runs out or low the main thing freezes and stops working right. If it'4 frozen you can blow a hair dryer to melt the ice but only a licensed fixer person can do anything more permanent. Good luck!

    Answer by Kiwismommy19 at 11:27 PM on Aug. 9, 2010

  • go outside and look at the back. If it's covered in ice you have to shut it down for a couple of hours. best to do it at night, when it's cool.

    Answer by lovinangels at 11:27 PM on Aug. 9, 2010

  • Our CHA unit did that at our old house. The unit was freezing up because of years of buildup in the ducts. Can you see your unit? If so, check and see if the pipe that runs out it is frozen. We had a friend who came out and cleaned out the ducts for $60, but the regular H&A guy wanted $350 for the same job, so be sure to shop around.

    Answer by scout_mom at 11:27 PM on Aug. 9, 2010