With a Halogen electronic leak detector.
You can find a Freon leak in a home Ac unit by using a leak detector. These instruments are capable of detecting trace amounts of Freon and pinpoint leaks.
It is probably getting low on freon. When the system has minor leaks and the freon pressure lowers the system begins to shut off the compressor which circulates the freon through the system to protect the compressor and other components from damage. Have the system recharged, or add freon on your own. You can now get freon from many parts stores.
It usually means that your system has developed a leak. Your AC system is charged with freon gas. If a certain amount leaks out, a safety device prevents the AC compressor from starting. Without the compressor, no cold air.
Find the source of the water and correct it.
There probably is a leak. Is there still freon in it? There are ares in the a/c system that are not visable. Was Dye added?
most likely low on freon. while driving the ac compressor spins faster so it might cool better with low freon at higher engine rpm. have your system charged and checked for leaks.
Either low on freon or the low pressure switch is bad. You are gonna have to put a set of gauges on it. Usually this happens when the freon leaks out of the system. If there is not enough freon in the system, the low pressure switch keeps the compressor from coming on and being burned up.
Freon could be leaking anywhere in the ac system. A colored dye can be added to the system, then seen with a special light to find the leak.
A refrigerant (freon) is required for an A/C system to cool. Therefore, no, the A/C should not work is the freon is removed.
The Freon probably needs to be recharged. Any repair shop should be able to do this. They should also test the system for leaks to see why the Freon leaked out to begin with.
Depends on the capacity of the system, which refrigerant your car uses (either R-12 or R-134a - Freon is a trademark of Dupont, and only applies to R-12 manufactured by DuPont), and also how complete of a service you have done. You should have a system performance test done on your AC system to identify any potential leaks or other problems.