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I have a Honeywell thermostat with a K wire. How do I install an ecobee thermostat?
hvac - How can I modify a 4 wire thermostat to a new thermostat requiring c wire? - Home Improvement Stack Exchange
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Honeywell CT410B1017 Manual 4 Wire Baseboard/Line Volt Thermostat
HVAC PROBLEM SOLVER
Am I compatible? There is also an addition yellow wire hidden in the back. Can't find anything referencing 1-4 like this. : r/ecobee
4 Wire Thermostat Wiring Color Code — OneHourSmartHome.com
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4 Wire Thermostat Wiring Color Code — OneHourSmartHome.com
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HVAC PROBLEM SOLVER
Replacing Honeywell dial thermostat (4 wires) | Screwfix Community Forum
2-Wire Installation for Honeywell Thermostat - YouTube
Blue "C" wire is connected to "Y" on old thermostat. New thermostat has separate "C" hookup. Where does the blue wire go - "Y" or "C"? : r/Nest
