Difficulty upgrading thermostats due to inconsistent wiring
🏠 homeproduct problemSingle report ●●●●●
A new homeowner of an older property reports difficulty upgrading multiple thermostats because the existing furnace control board wiring is inconsistent, with some zones lacking a common (C) wire required for modern smart thermostat installation.
What people do today
- Using power extender kits
- Running new thermostat wire through walls
- Using battery-powered thermostats
🔧 Fix this
Ideas a builder, maker or community group could start on:
- A universal power-stealing adapter kit that works with any furnace control board to provide constant C-wire power without needing new wall wiring.
- A diagnostic mobile app that uses photos of control board terminals to generate a custom wiring diagram for specific thermostat models.
- A standardized, easy-to-install wireless thermostat bridge that connects to the furnace board and communicates wirelessly with multiple zone thermostats.
Real voices
“I want to replace the thermostat wires with 3 wire thermostat wires and connect R, W, and C to each thermostat”
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