Today I noticed the AC wasn't working. I checked the unit outside and saw the line freezing. I checked inside and it's frozen as well.
I turned the AC off and fan on. The ice is melting now.
I suspect it has to do with poor air flow. I bought this house 3 months ago and the pleated air filter was missing. I put one in and the AC continued working fine. It stopped working one time a few weeks ago. I turned it off for a bit and back on and it worked again. I didn't think much of it.
After the ice melts, what should I do before trying to turn it back on? I'm going to clean it as best I can. I'd like to avoid further damage and calling a professional.
Edit: After the ice melted. Hard to tell but I cleaned it using a mop. A lot of dust fell from it. I turned it back on and it's working well so far.