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
I currently have 2 wires coming from furnace. Ecobee says: Based on your wiring selection of Rh and W or W1 your home is compatible with ecobee, but you will need to
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