AC Not Cooling After Thermostat Replacement: Common Mistakes 18864: Revision history

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30 December 2025

  • curprev 20:0120:01, 30 December 2025Fridiehtyn talk contribs 22,513 bytes +22,513 Created page with "<html><p> The call usually sounds the same: “We swapped the thermostat and now the AC won’t cool.” A few questions later, the picture comes into focus. The new thermostat is glossy and smart, but the outdoor unit never kicks on, or the blower runs without cold air, or the furnace not heating issue suddenly shows up after a warm spell. Thermostat replacements look simple because the device sits on the wall, but that little panel tells every part of your system when..."