Furnace runs but some rooms are much colder than others

Safety first: Turn OFF power before entering attic or crawlspace to inspect ducts.

• Check branch dampers: Locate manual dampers on branch ducts and ensure they are open to cold rooms.
• Inspect ducts: Look for disconnected or crushed ducts leading to problem rooms. Reconnect and support with straps.
• Register adjustments: Slightly close registers in overheated rooms to push more air to colder areas.
• Professional balancing: An HVAC technician can perform airflow measurements and adjust the Kelvinator furnace blower and duct dampers for even heating.