Indoor temperature varies widely between rooms during cooling

Safety first: Use caution when accessing attics or crawlspaces. Watch for exposed nails and wiring.

Steps:

• 1. Balance registers: Slightly close registers in rooms that are too cold and fully open those in warmer rooms.
• 2. Check for duct leaks: Inspect accessible ducts for disconnected sections or obvious leaks. Seal with mastic or UL-181 foil tape.
• 3. Verify blower performance: Ensure the blower wheel is clean and the motor is running at the correct cooling speed.
• 4. Consider zoning or duct modifications: For persistent imbalance, consult an HVAC contractor about zoning dampers or duct resizing.