Who should you contact to put freon on your central air conditioning unit?
A reputable HVAC service Co. will locate and repair the leak and recharge your system.
What is the freon capacity for the air conditioning system and compressor oil on a 1993 Chevy Suburban C1500 5.7?
How many times can a landlord legally add freon to a central air conditioning unit before he is required to fix the problem?
Freon is not Toxic, but its not good to breath it or have extended contact with it on the skin. It is a controlled EPA substance. Some are Flammable and have other properties like 410A which is a mixed blend of Freon/Purion. Under pressure 410a is one liquid but outside of the system the Freon components separate and become to different chemicals.
Does freon have an odor and burn your eyes and throat if leaking into the house from air conditioning?
Freon is odorless, non-flammable, and is not corrosive. It is unlikely that's the source of your discomfort. Moreover, if your central air unit sprang a leak, it wouldn't take long for the freon to discharge completely. Your unit will no longer being cooling. If it's still cooling, even inefficiently, it's definitely not the freon.
It does not contain Freon. It contains R134a. There is no need to change the refrigerant. Any A/C service should be done by a qualified technician, with the proper tools and equipment. Please do not attempt any service or repair without the equipment and expertise necessary. Serious burns due to frostbite can occur through contact with the refrigerant.