2-Wire heat only furnace for Nest E. The Nest is having problems staying powered. Can I use an external 24V power supply? How would I route the additional wires? https://www.amazon.com/dp/B07FT2RCG9/ref=tsm_1_tp_tc : r/ Nest
thermostat - Adding a C Wire using a 24V AC Transformer to a 2 Wire Heating System for Nest - Home Improvement Stack Exchange