Steve,
Your right about carrying a spare board, which I have for 5yrs now. Unfortunately I didn't get my spare rebuilt after replacement 5yrs ago. After my spare gets back from Flightsystems, I will rotate out the jumper wired one thats working now. The tech at Griffen Air and Heating in Bend Oregon said he sends his boards to a local tv/electronic repair shop. I may try that on my next one.
Seems to me the biggest problem is compressor connectors on the board. These A/C are fairly simple,BUT getting a shop to service them is extremely difficult. Why I don't know.