Thermostat and system operate, but the indoor temperature overshoots the setpoint significantly.

Safety first: Only configuration changes are needed.

• Step 1 – Adjust cycle/differential: In the thermostat settings, reduce the temperature differential or cycles per hour to tighten control.
• Step 2 – Check thermostat location: If the thermostat is in a hallway far from main living areas, consider relocating it to a representative room.
• Step 3 – Observe response: After adjustments, monitor several cycles to see if overshoot is reduced.

When to call a professional: For relocation or if overshoot persists due to equipment sizing, consult an HVAC technician.