Furnace starts then shuts off after a few minutes; blower continues to run with cool air

Safety first: Turn OFF power before removing panels. Components may be hot.

• Replace filter: Install a new filter of the correct size and MERV rating. Avoid overly restrictive filters unless ductwork is designed for them.
• Open airflow paths: Make sure all return grilles and supply registers are open and not blocked by furniture or rugs.
• Check blower wheel: Inspect for heavy dust buildup and clean if necessary to restore airflow.
• Professional adjustment: If overheating persists, a technician may need to increase blower speed or evaluate duct sizing for the Kelvinator furnace.