First, I want to thank you all for the information I've picked up here!
I know that an undercharge will cause a coil with otherwise sufficient airflow to freeze up. Is the converse true - will an overcharge (no superheat) prevent a coil with insufficient airflow from freezing up? (I'm not sure but I think there's no TXV - 1988 Ruud coil). I assume that's bad for the compressor, inefficient, anything else?