I experienced some issues when installing a new Nest Thermostat myself. Nest tech support recommended I chat with Mark at Ice Tech. Mark came to my home same day and found the issue with my heating pump wire connection. He contacted the furnace manufacturer to determine how we could safely rewire the connection to allow use of the nest thermostat. Within an hour or so, everything was up and running. Mark was very friendly, easy to work with, and on time with the scheduled appointment. Highly recommended.