My AC will turn on but will not blow out cold. I'm rebuilding the whole system, ductwork and all.
I've shorted the thermostat's red (power), yellow (a/c compressor), and green (fan) wires together. The handler and compressor are both running. However, the system blows out room-temperature air.
What could be the issue? I haven't run the system for over a year, so it could have gone bad at any time really. Only thing I can think of, is that possibly the refrigerant is low, but I have no idea how to check it. The insulated refrigerant line doesn't seem to be getting cold. The compressor and interior of the handler are mostly clean - a little dirt/dust, but I doubt that it'd totally starve the system.
Is there a way to narrow down my search some more?