Arrived on site for a nest without power. He removed and charged it to get the thermostat to work temporarily but we found the common wire wasn’t attached, not keeping the thermostat charged. We also discovered some dirty duct work, impacted filter and dirty blower wheel responsible for limit switch faults after running heat for awhile. We changed filter, and spoke about joining Homecare to avoid things like this. During our inspection client had to leave to pickup his son, and asked me to close up behind me on the way out. I did create some estimates I emailed over but the thermostat is fully operational, filter change eliminated limit faults and the system is heating properly again, despite some signs of wear and tear on the unit. Call complete.