Heat pump not defrosting due to a bad defrost control. Not the worst I’ve seen, but pretty bad. Installed new board, ran it through defrost, and hooked up to check the refrigerant charge. Then went and sat in my nice warm truck filling out my invoice while monitoring it. After 20 minutes, discharge at service valve = 110º over ambient, just like Goodman calls for. I like anything that reduces the time spent freezing my arse off while checking a heat pump!