I turned it down to 65 F to cool off house but still sits at 85 and hasn't cooled down at all and its been set to 65 all day - how can I make it cool down?
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Those may be the upper and lower limits. For cooling you would not want the system to allow the temp to rise above 85. Conversely when heating you would not want the heating system to go below 65.
I lost you at my the end but the 2 ton unit should be able to cool 960 sqft. Sounds like a refrigerant problem. Air conditioners should cool the air 15 to 20 degrees. This means 80 degrees going into the machine in the return should be 60 to 65 degrees coming out in the supply. If you are in that range than it's likely never going to cool the space.
As to your question 'will 75 cool the house?' The answer is 'yes' - if the outside temperature is low enough. Typically speaking you can expect your central AC to cool a properly insulated house to a down to a temperature of about 20-25 degrees lower than the outside temperature. For example - if the outside temp is 95 degrees. You could expect to get your house down to 70-75 degrees. If the outside temp is 110 degrees then you could only expect to get the house to 85 or 90 degrees.
So .. as you can see - your 'inside' temp will be directly affected by the 'outside' temperature.
As to the operation of central air; it is very simple.
I would suggest that you not pay 'too much attention' to what you have the thermostat set on. A comfortable temperature - is a personal thing - so - I would set it somewhere - say 72 and see how I (and others in the house) was handling that setting.
If you want it 'cooler' just 'notch' it down a degree or two - if you need it a little warmer - turn it up a degree or two. Do this "fine adjusting" till you have the temperature setting you are comfortable with.
Usually the more you can leave your thermostat alone the better off you will be from a comfort position and an electrical useage standpoint. Obviously, the higher you have your thermostat set the 'less' it will cost you on your electric bill.
How high you set the temperature is a balance you have to come to based on how comfortable you want to be - matched with how much you want to hold down the electric bill.
Strange. Does the thermostat control both the air conditioning units and the furnace. If not make sure the furnace thermostat is turned down to below 65 degrees.
make sure the system switch is in the cool position, then press run program button and allow a couple of minutes for system to cycle on, if it doesn't come on press the button for lowering the set point, set it to 72 degrees and then press the hold temperature key.
An A/C unit is a dehumidifyer BUT Unit are rated in Pints of water, a Unit in Florida might need a de humiditiyer connected to it, the air is heavy with humidity. Another reason is that the Unit is under sized or not allowed to run long enough (?) Infor. on what State you live in would help and the size of the apt. or house the unit is covering. The best T / H would be 70* and 55 H and that would be on the cool side for most people , avg temps in a house would be 74* 65%, body temps are 98.6 most A/C unit are rated at 90* amp temp ( outside ) if the condenser is dirty this will cut the performance on a hot day over 85* Keep unit clean -replace filter (s) . If your getting a 15 degree reading between outside and inside your doing good the best would be 20 degrees ( depending on heat load) windows, and sun. Actic fans remove 30% of the heat -it will drop the temp from 120 to about 85, this can save you a lot of money in A/C bills and help cool the house in warm day when you don't need the A/C.
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