Thermostat shows large temperature swings; room becomes too hot or too cold before system turns on or off.

Safety first: No high‑voltage work is required.

• Step 1 – Adjust temperature differential: In the thermostat settings, locate the Temperature Differential or Cycle Rate option. Reduce the differential (e.g., from 2°F to 0.5–1°F) to tighten control.
• Step 2 – Check thermostat location: Ensure the thermostat is in a representative area of the home, away from drafts, direct sunlight, and heat sources.
• Step 3 – Enable adaptive recovery: If available, enable Adaptive Recovery or Smart Recovery so the thermostat learns how long the system takes to reach setpoint.
• Step 4 – Monitor performance: After adjustments, monitor temperature swings over several days and fine‑tune settings as needed.