Replacing a Honeywell thermostat is a straightforward DIY project that typically takes between 20 to 30 minutes for a beginner. The process involves turning off system power, taking a photograph of the existing wire connections for reference, unscrewing the old wall plate, mounting the new base, attaching matching wires to corresponding lettered terminals, and snapping the new display into place. Verification: Confirm that the new unit powers up correctly and successfully commands both heating and cooling cycles.
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