[R Wilco]

Geez. Hold up. If you'll pull the panel off that exposes the coil, sometimes when it freezes up it attracts dirt, sludge, mold whatever. Get you a couple of cans of brake cleaner and blast that crap out of it there. My neighbor has a system that is 50 years old, mine is 30, I have to do this every couple of years because the filters let stuff through.The systems are closed, you shouldn't have leaks unless something is rubbing on something creating a hole in a hose etc.