AC - frozen tubes, no air flowing when fan on and system off
Turn the system off and let it warm up this may take a while if the evaporator coil is frozen up. When a system charge is low icing of the coils is a indication. The fan motor may be bad but once fully defrosted it is possible it will work. (Thermal overload tripped and was just hot because the coils were iced up) . If you can not get into the evaporator coil the indoor one give it a good long time to thaw out there may be 20-40 pounds of ice in there and it takes a while. The green liquid could possibly be a leak we regularly narrow leaks down by spotting oil that has leaked. The green liquid could be condensate that has grown some green gunkies. Don't jump to conclusions I have seen systems do exactly what yours has done that worked after thawing. In these cases adding some Freon or in more severe cases pulling the system to a vacuum after repairing the leak and recharging has worked for me. The noise every 10 minutes may be the thermal overload on the fan resetting and then overheating from blocked coils. I did not see the photos on first review but the PVC line looks like your condensate line and it has been leaking could be plugged with algae or my technical term Green Gunkies.  The coil and drain need to be cleaned for health reasons! The heavy frost could be from a low Freon charge or the evaporator coil icing up and the heat exchange not occurring.  Since you can not open the evaporator get an HVAC person to do it it was probably sealed with calking that a razor knife can cut through the system must be opened and inspected at a minimum.