Thermostat frequently cycles the HVAC system on and off in short bursts (short cycling).

Safety first: No high‑voltage work is required for thermostat adjustments.

• Step 1 – Increase differential slightly: In the thermostat settings, increase the temperature differential or adjust cycle rate to reduce the number of cycles per hour.
• Step 2 – Check thermostat location: Ensure the thermostat is not directly in the path of supply air or near a return grille, which can cause rapid temperature changes at the sensor.
• Step 3 – Inspect filter and airflow: Make sure the air filter is clean and vents are open; restricted airflow can cause equipment safety switches to trip and restart.
• Step 4 – Monitor system: If short cycling persists despite settings and placement being correct, an HVAC technician should evaluate system sizing and safety controls.