Uneven Heating and Cooling: Causes of Hot and Cold Rooms

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Safe checks before scheduling service

1. Check that supply registers and return grilles are open and unobstructed.
2. Replace a dirty filter.
3. Compare rooms with strong airflow against rooms with weak airflow.
4. Notice whether the problem changes by season, time of day, or door position.
5. Consider whether recent remodeling changed room use or airflow.

If you encounter exposed wiring, smoke, a gas odor, a carbon-monoxide alarm, or another immediate safety concern, stop troubleshooting and follow the appropriate emergency guidance.