Some rooms are too hot while others are too cold when the Carrier furnace runs.

Safety first: Turn off power before opening any duct access panels.

• Adjust supply registers: Partially close registers in overheated rooms and fully open registers in colder rooms.
• Check for blocked ducts: Inspect accessible ductwork for crushed or disconnected sections, especially in attics or basements.
• Replace filter: Ensure the furnace filter is clean to maximize airflow.
• Consider duct balancing: If manual dampers are installed on branch ducts, adjust them to direct more air to colder areas.

Persistent imbalance may require a professional duct evaluation and possible modifications.