[Wanderman]

Richard,
yup.. as usual I'm the oddball. I should be used to it by now. Removing the board is likely a good idea. It's not obvious how it is attached to the chassis. Sort of looks like a nylon standoff on the lower left with a bit of hot melt glue... but not 100% sure. Usually there are some screws or some such.

I agree the it definitely appears that some overheating has occurred at some point. The smaller cap looks really bad, the other may be of a newer vintage. Anyway it's now raining again so not going to fool with it any more today.

Perhaps before I remove the board, I will have someone switch the relays at the thermostat leads (or create a jumper set at the board) and see if any 120v is passing when the relays are closed.

No problem using a soldering iron, I've don trace fixing and the like. Even component level replacement is OK.

I wonder if there isn't a simple AC control board that would just work instead of the factory one installed here. I mean, it's a simple AC unit, right?

We shall see what develops.

Thanks!