Up early and out of time already. I spent some of the morning dealing with a frozen-up "A" coil* and now I have to get in the shower.
Low working fluid, again. I'll have to call the HVAC tech, and sooner rather than later.
* Why is it an "A" coil, and does that make the one in the compressor unit outside the "B" coil? It does not. The shape of most of them, set to allow maximum contact with the air flowing by, is like a capital lambda; larger ones may have a cross-brace, and this, seen end-on, forms an "A."
3 months ago