To buy ac Freon you need to be certified and to add ac Freon to central air conditioning unit is risky.The air conditioner filters are normally located in return duct grills or in the air handler. Read how to change air conditioner filters.
Usually in the air handler
The high and low Freon valves are located on the air conditioning compressor. Use the low Freon valve to recharge the air conditioning system.
In the air handler on the circuit board a 5amp fuse.
If you are experiencing freezing on your air handler coil, you may want to check the freon charge to determine if it is correct. Assuming that your thermostat is operating properly, reduced air flow can also cause freezing. Check your filters and other possible blockages such as dirt on the interior coil.
Inside unit that distrubute air threw a handler unit
Check all of the following................. 1. Freon level in system. 2. Pressure switches and relays. 3. Controller head. 4. Power and ground going to the compressor clutch.
It sometimes depends on the temperature difference between the condensing unit and the air handler. I would say normally no more than an hour.
where is low side charge port located
low on freon, filters plugged, a coil inside air handler dirty, windows and doors leak too much, broken piping in air delivery system, fan too small
trane air handler tonnage for model BWV760P100A1
Usually stamped on the outside of the handler.