For technicians who run across older furnaces where air conditioners were later added, it pays to know how a fan center operates.

The ACHR NEWS visited Flame Furnace in Warren, Michigan to learn how to do maintenance and basic troubleshooting on a furnace.

The NEWS’ senior managing editor, Maria Taylor, visited Flame Furnace in Warren, Michigan to learn about electrical wiring in furnaces. Taylor then practiced her skills on a furnace simulation board.

Any furnace with induced draft combustion may occasionally exhibit unburned gas odor near the furnace in the off cycle.

The equipment in this month’s troubleshooting problem is an electric furnace that has been in service for at least ten years and has no service history.

Our troubleshooting problem involves a complaint from a customer who is concerned that their electric furnace is running excessively and wasting energy.

The end of the year is upon us, so it is time for my annual HVAC predictions column.

Let’s explore how to check furnace heating output in four steps and see what clues it provides.

The timing for any standout year in the furnace business will depend on weather and consumer confidence.

In this troubleshooting situation we find ourselves dealing with a gas furnace, and the customer has said that “there is no heat at all.”