System short cycles (turns on and off frequently) and does not maintain temperature

Safety first: Turn OFF power to the thermostat circuit before moving or rewiring.

• Step 1 – Check thermostat location: Ensure it is not in direct sunlight, near lamps, or directly in the path of a supply register.
• Step 2 – Adjust cycle settings: Many thermostats allow adjustment of cycles per hour or differential. Set to a lower cycle rate for longer run times.
• Step 3 – Airflow balance: Adjust registers to reduce direct airflow on the thermostat.
• Professional evaluation: If short cycling persists, have a contractor verify equipment sizing and duct design.