Furnace Operation and Safety Concepts

The video tutorial by Vance explains how gas furnaces work, covering the basics and diving into the sequence of operation. It discusses the components involved, such as the heat exchanger, blower fan, and thermostat, and explains the efficiency ratings like AFUE. The video also covers safety features, including lockout procedures and safety switches. It concludes with a call to action for further resources and troubleshooting guides.

What is the primary function of a gas furnace?

• To humidify the air

• To cool the air in a home

• To burn natural gas for heating

• To circulate cold air

What does AFUE stand for in furnace ratings?

• Average Fuel Utilization Efficiency

• Annual Fuel Usage Efficiency

• Annual Fuel Utilization Efficiency

• Annual Furnace Usage Efficiency

How does a dual-stage furnace differ from a single-stage furnace?

• It uses more fuel

• It can run at full or reduced speed

• It operates at a single speed

• It only operates in cold weather

What happens when a safety switch is tripped in a furnace?

• The furnace continues to run

• The furnace locks out

• The furnace increases its speed

• The furnace reduces its temperature

What is the role of the draft inducer fan in a furnace?

• To cool the furnace

• To ignite the burners

• To circulate air in the home

• To help exhaust emissions

What ensures there is enough airflow inside the heat exchanger?

• The gas valve

• The pressure switch

• The blower fan

• The thermostat

What happens if the flame sensor does not detect a flame within 7 seconds?

• The gas is shut off

• The furnace continues to run

• The blower fan starts

• The gas valve remains open

Why is it important to replace the furnace filter regularly?

• To increase the noise level

• To reduce fuel efficiency

• To increase airflow restriction

• To prevent overheating

What happens when the thermostat signals that the home temperature is normalized?

• The gas is shut off and combustion stops

• The furnace increases its speed

• The blower fan stops immediately

• The furnace starts heating again

What should you do if your furnace is having trouble running?

• Replace the furnace immediately

• Increase the thermostat setting

• Watch a troubleshooting guide

• Ignore the issue