Furnace cabinet sweats or shows condensation on the outside during operation.

Safety First: Turn off power before removing panels.

• Check for water leaks: Inspect condensate lines and trap for leaks that may wet the cabinet.
• Improve room ventilation: Reduce humidity in the furnace area with ventilation or dehumidification.
• Seal air leaks: Seal gaps around duct penetrations and cabinet joints to prevent cold air infiltration.
• Insulate ducts: Add insulation to nearby cold ducts to reduce condensation.