Trying to replace this old 2 wire thermostat for a newer digital one. Problem is older unit does not have leads labeled or which cable is which. Any help on how to
Honeywell THX9421R5021WW 2 Wire IAQ High Definition Touch Screen Thermostat with Red LINK Technology, White: Amazon.com: Tools & Home Improvement
My heat-only system only has two or three wires connected to the thermostat. Am I compatible with ecobee?
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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
Can I install a nest thermostat on a 2-wire boiler (with unmarked wires)? - Home Improvement Stack Exchange
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