How do Furnaces Work?

November 16, 2018


Most homeowners use furnaces or their home heating needs. They are among the oldest and most popular heating systems. When they first came into existence, furnaces were fueled using coal and wood. These days, they mostly use heating oil, propane, electricity, and gas. Newer models have AFUE (Annual Fuel Utilization Efficiency) ratings of 98%. This means that only two percent of the fuel goes to waste. It is important to know a few things about your furnace. The more knowledge you have, the better you are equipped to deal with problems if they occur.

Thermostat and Gas Valve

For your thermostat o turn on, it must get a signal from the thermostat. It is, therefore, unable to function without one. Once you set the temperature, the thermostat will activate your furnace whenever temperatures go below it. When the temperatures are low and your thermostat sends a signal to the furnace, the gas valve opens and the burner is ignited. The gas valve and thermostat control the amount of air that is getting into your furnace.

The Heat Exchanger

When the burner is ignited, the flames heat the heat exchanger. This heat is circulated in tubes in the heat exchanger and passed into the air to make it warmer. If your heat exchange is faulty it is impossible to get warm air.

Blower Motor and Fan

The blower motor and fan help to distribute the warm heat as it circulates in the heat exchanger. They move it through the plenum and to other parts of your home making it warm. When your home is warm enough, the thermostat turns it all off.

St. Louis Heating Repair

These are the main parts of your furnace. If there is a problem with any of the parts, it is important to get professional help to repair them. If you are in St Louis or its surroundings, contact Scot-Lee Heating Company for all your AC and heating services. We are available 24/7 and they will be glad to respond to your needs fast. We have been in the business for more than 40 years and our company is known to have trained and experienced technicians who always satisfy the needs of customers.