Most common problems that causes this in order:
Check in order before calling a repair guy.
Central HVAC provides central air conditioning, central heating, and central ventilation packaged in one unit. As such it will heat, ventilate and cool your home.
overcharging a central air unit system with refrigerant(freon) will cause the head pressure to be?
Using window units instead of a central unit, in main points you want to cool. will save on your electric bill.
To cool more than two rooms it is economically more efficient to purchase a central air conditioning unit than a wall unit. Wall units are individually cheaper than central air, but if you have to buy more than two, then it is better to buy the central air unit.
Program
No. cause it would consume more energy to make the room cool. Hot air rises and cool air sink, so to make the room to a controlled cool temperture , it is advisable to place the aircon unit on the top.
Central Unit ended in 2011.
Central processioning unit.
central processing unit
Central Processing Unit .
This unit is designed to cool a room up to 200 square feet.
Central Processing Unit