TXV or Blower

I turned on my air conditioner for the year and the lines all froze up. 410 was topped off, evaporator coil was cleaned, air filter was changed. Lines still froze up. I checked my vents and I am hardly getting any air flow. I turned off the air conditioner and turned the fan to on. Still no air flow. My run capacitor was a little low, so I replaced that. Still no change. The blower is spinning, but was a little dirty. I took apart the whole blower and motor, cleaned everything. Still no change. I have checked all my ducts and everything is fine. With the gauges at the condenser, my high is reading perfect, but my low is about 20 low and won't come up. That makes me think txv. But with no air flow even on fan alone and the fact I was starting to have air flow problems this winter, I was thinking blower. Can the blower be running slow enough to freeze up my lines? Or is it the txv? I'd rather replace the blower motor than txv, since I don't have the equipment, but don't wanna waste time and money if it's obviously txv. Thoughts? 7 year old Bryant