Yes, some of the low end brands are made without a low pressure safety switch and will allow the unit to run until the compressor dies, should the charge leak out.
Any AC, house or car has a pressure switch in the system so that if there is not enough freon in it, the compressor will not come on. The fan will run, but that is all. It is just circulating the air. Nothing will be damaged in the system running it without freon.
Freon? R12? Good luck finding it (Ebay?) AC systems in newer cars are R134a. You can RETROFIT an older vehicle to run R134a. You can run a car without freon/r134a - The AC has nothing to do with the vehicle performance...just human comfort. Don't expect cold air, there's nothing to produce the cold air without the Freon/134a. That's like asking if it's okay to wear shoes without socks. The shoes still work but your feet will stink and sweat and chick won't ask for you phone number.
yes
Look to see if the compressor is running when the ac is on. If not, then check the Freon pressure, as the compressor won't run if the Freon is low.
The system is probably empty of freon. Running the pump manually without freon can damage the pump. The pump relies on the freon to carry the oil for lubrication.
You can still use only the heater if you want to but its best not to leave the a/c without freon and oil in the system..............
A good analogy would be ' can water get out of a a bottle without a leak?" the answer is "no". If you run out of freon you have two things. Either you have a leak somwhere, or you have a bad schrader, which of course is a leak. the schraeder on your ac is similar to one on a car or bicycle tire. the little stem.
Yes your ac just won't be cold
no it has a safeguard to prevent overheating the compressor
Freon can leak. Since it will do so in the form of an invisible, odorless gas, it is very difficult to observe such a leak.
It a word, no. Without a leak, the freon level in your unit should stay the same for years and years.
how do you check freon on central ac and what should the guages read.