There are many reasons why it does not work: it may have lost all its refrigerant because of a leak in the system; its compressor pump may have stopped working; etc...
If you cannot see anything obviously "set wrong" on the controls of the ac unit, the best advice anyone should give you is to call a licensed Heating, Ventilation and Air Conditioning (HVAC) technician to advise you and/or fix it for you. For personal safety reasons only technicians who are licensed to work on HVAC (Heating, Ventilation and Air Conditioning) should do this kind of work because they have the right test equipment and tools and have been trained in how to do this work safely.
The outdoor portion of the central ac unit is what gives up the heat from indoors, so it has to be outside. For a more thorough explanation see the question: How does air conditioning work.
you might need freon in the air condition.
in central ac we use chiller to cool the water which is circulated throughout the building . by blowing air over the cooled water tubes the air got cooled. in night time inplace of cold water FM chiller , hot water is circulated which make the air hot.
When using an air conditioner, it's generally not necessary to ventilate the room, as AC units are designed to cool and dehumidify indoor air efficiently without bringing in outside air. However, occasional ventilation can be beneficial to improve indoor air quality, especially if there are pollutants or stale air. If the air conditioner is running in recirculation mode, it continually filters and cools the existing air. In contrast, introducing fresh air can increase energy costs and may reduce cooling efficiency.
Yes, the heat pump (in the heating mode) is like an air conditioner in reverse. It cools the outside air and heats the room air. Of course, you need Freon to do this heat-transfer process.
Have you checked the breaker outside by the unit
needs oil..
The problem is probably outside. Can`t tell you much more than that from here. The condenser unit outside was not running. I checked the circuit breaker box and found the 220 breaker had been switched off. Turned it back on and now it's running and I'm getting cool air.
The outdoor portion of the central ac unit is what gives up the heat from indoors, so it has to be outside. For a more thorough explanation see the question: How does air conditioning work.
No, but it's a good idea to protect any metal equipment from extreme weather.
keep it closed the windows .but if need fresh air from outside , open the windows.
What about them?
yes you can
Central air conditioning systems are designed to provide ventilation by bringing in outside air. Leaving a window open would tend to defeat the cooling effect.
No, an air conditioner does not bring in outside air. It cools and circulates the air already inside a building.
When air is cooled the water in it comes out (like mist forming on the outside of a class filled with cold coke) and this happens in the air conditioner. Normally the dripping water is drained way to the outside (or a drain) by a pipe. If the pipe gets blocked the water will overflow and the conditioner will leak water - get it serviced.
The first thing to check is that the outside unit is running. That the compressor and the Fan is running. If they are running, then have the Freon pressure in the system checked. You may be low on coolant.