Furnace short cycles: starts, runs for a few minutes, then shuts off and restarts frequently.

Safety: Turn off power before removing panels or filters.

Steps:

• Replace filter: Install a clean filter of the correct size and type recommended by Atlantic.
• Open vents: Ensure all supply registers and return grilles are open and unobstructed to allow proper airflow.
• Check blower speed: On some models, blower speed can be adjusted via dip switches or programming on the Atlantic control board. A technician can increase airflow to reduce overheating.
• Monitor operation: After cleaning and airflow corrections, observe a full heating cycle. If the furnace still shuts off prematurely and restarts, the high limit or temperature sensor may be tripping and should be tested.

Note: If the furnace is significantly oversized, a professional may recommend zoning or equipment changes.