Frequently Asked Questions (FAQ) for Central Air Conditioner

1. Is our central air conditioner working properly?

One other thing that can mess up a program is if the Humidistat is set too high.

If your house has one it will be separate from the thermostat. The best setting is to set it at it's lowest setting which is just immediately after turning it on and backing it down to just before turning the dial off. Another thing you can look at is one of a couple of capacitors might have gone bad.

Its just a matter of finding which one. They can cause the problems you are experiencing now. Contact your builder and/or the contractor who installed the Unit and stand on his eyelids until he or they fix it!

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2. Central air conditioner never shuts completely off?

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3. Power Bill: Which costs more to run/use for 30 days?

The central air conditioner will cost many times more to operate than the ceiling fan - about 1 to 2 cents per hour for the fan, compared to at least 20 cents per hour for the air conditioning system, depending on its size (btu's or tons_ and its SEER (efficiency rating). The idea of the ceiling fan is to keep the air moving, thus evening the temperature throughout the area, minimizing the variation in temperature between the a/c cycling off, on, off, and to provide a more comfortable feeling at a somewhat higher temperature. So, use both.

Use the ceiling fan(s) to reduce the need for the a/c, then raise the a/c temperature as high as you can and still be comfortable.

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4. It's the first time I turned on my central air conditioner this year and it's not working.

On most central air units, there is another reset button inside of the unit itself. First, you'll want to check your a/c breaker, make sure the thermostat is set properly, etc. If all is good there, then you will want to check the fuses (if you have a continuity meter/tester.

) If you don't have meter, then turn the power off (at the breaker for the a/c) and then carefully unscrew a panel on the a/c. Nearly all of the resets are in the panel on the corner, (the only corner that has a panel instead of coils.) While you have the power off, you'll just have to look around for the reset button.

I can't really tell you exactly where it is at because each model is different. Once you find it and hit the button, replace the cover, turn the power back on etc., and that may do it.

Be very careful when dealing with this, you do not want to get shocked with 220v. If it still isn't working, your best bet is to just call the professional. At five years old it could be a bad fan motor or something more serious.

Good luck, hope this helps!

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5. water leaking around the furnace when the air conditioner is running?

The air is usually circulated using the fans and duct system in the furnace - -whether it is hot or cold air. If you don't even know what the filter looks like, it's definitely been too long since it was replaced. They are usually pretty easy to find.

Open some doors/ panels on the furnace (they won't require a screwdriver, but should open like a cabinet or slide/lift off). The filter will be a large flat rectangle, either horizontally or vertically. Usually it looks like a cardboard picture frame, with a filter in the middle.

Yours probably has soooo much dust in it, that it looks like the filter in your clothes dryer. Leave the furnace OFF while you go to the store to buy a new one the same size. (The measurements will be written on the edge).

You do NOT want to run the A/C with no filter -- as particles will collect on the condenser and cause it to burn out. Get a medium quality filter, and buy a few. While you are at the store, the A/C will settle down, and the ice formed in it will melt out.

Look for more water, there is sure to be some. Why? Because when air can't move over the condenser coils, it turns that 'box' into a refrigerator, and the ice forms and builds up.

You NEED the air to move, AND be clean. Put a note on your calendar to replace/change the filter every month or two (see the filter for recommended cycle). The first one will get dirty quickly, as all the air that hasn't been moving will finally get a chance to blow all the crud out of the vent ducts.

You'll be surprised at how quickly the unit can cool the place down, now that the air can move freely. Close the windows, because the A/C works best when it controls the humidity, and you don't need it trying to de-humidify the whole outdoors

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6. Wattage for small central air?

OMG your roomie is a huge dumbasss. Tell him that when he sets the thing down to 55F it WILL NOT cool faster or colder. That setting only lengthens run time and places a huge load on the system.

Here's what you can do: without him watching, take the cover off the thermostat, then the midbase. The sub-base should still be screwed to the wall. use a very small screw and screw it in the small slot so that the thermostat cannot be set below,.

say, 65F. Either that or your roomie gets to pay the power bill from now on. This guy is taking advantage of you and being stupefyingly obnoxious; an A#1 gold standard olympic grade jackass.

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7. What size central air conditioner needed for a 1400 sqft house?

You are in luck.

I bought a home about two years ago and soon after we moved in the air conditioner went out .in august.in south alabama, talk about crappy luck!

Anyway we had a 2 ton unit at the time and I called a friend of mine who has his own air conditioning business and he told me that as a general rule of thumb you need to have about 1 ton for every 500 square feet. Now my home is about 1400 square feet just like yours, but we went up to a 2 1/2 ton unit at the behest of my friend who informed me that it is not much different cost-wise and will be more effecient. In other words, it will cut on and off more often but will only run for a few minutes at a time.

We have been extremeley pleased, he put in a Goodman unit which I had never heard of, but it must be a good one because it came with a 10 year warranty. Hope this helps you out!

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8.

Should you run a dehumidifier while the central air on?

No you do not. It will dry the air out too much resulting in nose bleeds and sinus trouble not to mention static build up.

The "A" frame in your air conditioner acts as a de-humidifier during the summer months. As the air passes through it it causes the moisture to condense on it and thereby removes the moisture. So no need for the de-humidifier to run as well.

As answer no.1 one stated though, runs it in the basement, that is different situation as most basements are notorious for moisture. Updated: You dehumudifier is in the basement, but is it on your central airconditioning unit or a stand alone?

If it is on your unit it will be drying out the whole house air too much. If it is a stand alone unit, there is a big difference and to run it year around in the basement is fine. Just make sure you are not drying the air out too much.

If nothing else turn it off for a day or two per week, this will keep basement humidity at a reasonable level while not over drying the air. If you notice excess static electricity ( rubbing feet across carpet and getting shocked when you touch metal or someone else) then you need to consider running it less or not at all. Hope this helps some.

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9. what uses less engery to us central air or air condition unit?

first - determin the size of the area you would like to cool.

if its just a bedroom to a small living room. a window unit will do just fine. as long as u let it run 24/7 (this allows the room stay cool and not let the compresser run as much) second - a central air works well on a larger scale which meaning a full house, apartment, trailer homes.

ect.when choosing a central air system you want to shop and compaire systems and efficiency as well as amps (the amount of current it draws) on a condenser unit it might display 2 diffrent amprage one might be with the condenseor pump running and the other might be just the fan.ideal would be low amprage and a high seer rating.

personaly i live in a single wide trailer home and i use two window units one on each side of the trailer.and it does just fine.but knowing a central air would cool the place ALOT quicker.

another thing to keep in mind.for better advice you might want to consult a HVAC mechanic