When I arrive, thermostat was displaying a high limit trip. When I checked the alerts on the furnace, I saw that the blower had tripped out on high limit. Three dampers were closed on the main trunk lines. I open those back up and explain to customer why these need to be open. After that, I ran furnace in test mode for 15 minutes on high. Furnace ran fine. When I let the thermostat control the furnace it shut back down. I had an identical thermostat on the van so I was able to just swap thermostats quickly and then test out the system. New thermostat is running heat pump first with the nicer weather as it should. I checked the outdoor unit and washed off the coil. System is operational at departure. We activated club membership today so we will return in the spring to perform AC maintenance.