If your air conditioner blows air but it's not cold air then you probably need freon in your air conditioner
You will need a set of refrigerant gauges, a tank of refrigerant and a refrigerant scale. You will also know technical knowledge of superheat and subcool and be EPA certified.
The need to take off the refrigerant.
The only way to know if Freon (refrigerant) is needed in an air conditioner is to use tools and gauges to measure the performance of the system. The amount of refrigerant needed is based on the design of the entire system including the size of the unit, length and size of the refrigerant lines, temperatures, and type of refrigerant. Refrigerant is not consumed. If refrigerant is needed then the system was either not charged correctly when installed or there is a leak. There could be many reasons a system is not cooling. The correct answer to the question is: A skilled service technician will determined that the system was low on refrigerant by using pressure gauges, thermometers and other tools. There not function a home owner can perform to see if refrigerant is needed.
An Air Conditioner needs the Type of "Refrigerant" that is stated on the (Identi-Plate) usually located near the condenser.
The amount of refrigerant required for an air conditioner is always on a sticker on the unit or nearby.
through the larger suction line at the condenser. you face several problems with that. 1. You must know what type of refrigerant to use 2. you must know the sub-cooling/Superheat of that particular unit at that temperature. 3. You must be able to purchase the aformentioned refrigerant. 4. Connecting to the cooling system you will need the proper guages/hoses. The HVAC system on your home is a hermetically sealed system... it should NEVER LEAK. if it is losing refrigerant, you have a leak somewhere. Call a good HVAC company to investigate the problem. You will almost assuredly need to replace some portion of the system.
It usually means that the air conditioner has low refrigerant. You need to get the compressor recharged - but beware - if the unit IS low on refrigerant, then you might have a leak in the cooling system.
Either you badly need a refrigerant recharge, or your AC compressor is shot. Or both.
Visit Auto Zone or Advance Auto Parts and tell them that you need a thing to recharge your air conditioner, they will understand what you need and show where to find what you are looking for. wherever you buy refrigerant you should be able to buy a can of refrigerant that comes with the charging hose included. most are reusable, just unscrew it from one can and screw it on the new one.
Never, unless you suspect of not cooling then there is a leak somewhere. A repair will need to be performed before recharging.
Make sure it's draining properly. Condensate, if it is allowed to remain stagnant, builds up an odor. If you have built up mould in the evaporation coil, you may need to have it professionally cleaned. Freon has no odor.
To clean the home air conditioner, you need to change the filter on a monthly basis.