Heater Not Working After Thermostat Upgrade: Compatibility Tips: Revision history

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29 December 2025

  • curprev 17:2717:27, 29 December 2025‎ Albiusfsyp talk contribs‎ 22,487 bytes +22,487‎ Created page with "<html><p> Upgrading a thermostat seems straightforward. Take down the old one, land a few wires, snap a new faceplate, and enjoy remote control and sleek scheduling. Then the first cold snap hits and the heater does nothing. The fan might run, the new screen looks perfect, but the house stays cold. I see this more than I should, especially after DIY installs on systems older than 10 years or in homes with heat pumps. The fix can be simple, but the reasons span wiring con..."
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