Ducts and vents are essential for healthy airflow at home. To ensure ideal air quality in your home, air ducts should be cleaned every 3-5 years by a home service pro. Other than reduced airflow, poorly maintained ducts can also lead to a decrease in energy efficiency.
Mark checked on the electrical wiring relating to the furnaces to insure that the furnaces are functioning efficiently with respect to one another.
Minor adjustments were made and both furnaces are functioning properly.
Kale suggested that the wiring should be examined by...