Sent out do a tearout and measure up for duct changes to improve return. Looked for the A/C and slapped my forehead as I should have known that everybody puts them there.
Second Pic is looking up into a double panned joist where I ripped out the return drop....holes seen are used for picking up a panned joist right next to it...made with a 5/8" drill bit. Can't understand why it was always freezing up on them.
Third pick is of this old a/c after I had helper strip it down to salvage copper. Took a smoke break and wondered where the contactor was. Have to admit I had never worked on one like this before. Chrysler product. I assume some kind of solid state board?...spent the afternoon building duct for an improvement. 2.5 ton system, btw.