The Most Common Problems with Furnaces

A quality furnace will last you between 15 and 20 years. As it draws nearer to the end of its lifespan, you may notice problems from time to time. 

Not all issues will result in replacement. Furnaces generally are quite reliable. However, they can experience a range of problems. Here’s what you can expect. 

Dirty or Clogged Filters

If you read any tips on furnaces, you’ll find the concept of filters is frequently discussed. That’s because it’s one of the easiest, least expensive ways to improve the lifespan of your furnace. As air is drawn into the furnace to be heated, it passes through a filter to remove dust, dirt, and other particles. Over time, these filters can become clogged, which reduces the furnace’s efficiency. If it’s never changed or cleaned, it can eventually cause it to shut down completely. Homeowners should regularly check their filters and clean or replace them as needed to avoid this problem.

Ignition Issues

Furnaces typically use either a pilot light or an electronic ignition system to start the combustion process that heats the air. If the pilot light is not lit or the electronic ignition system is malfunctioning, the furnace will not start, leaving the home without heat. Ignition issues can often be resolved by cleaning or replacing the ignition components.

Thermostat Malfunction

A malfunctioning thermostat can cause a range of problems with a furnace. If the thermostat is not accurately reading the temperature in the home, it may not signal the furnace to turn on or may cause it to turn on and off frequently, resulting in inefficient heating. Homeowners should regularly check their thermostats and replace them if necessary to ensure their furnace functions correctly.

Blower Problems

The blower moves the heated air from the furnace into the ductwork that distributes it throughout the home. If the blower is not functioning correctly, the furnace cannot heat the home effectively. Blower issues can be caused by a range of factors, including worn belts, dirty blower wheels, and motor problems.

Lack of Maintenance

Perhaps the most common problem with furnaces is simply a lack of maintenance. Like all mechanical systems, furnaces require regular maintenance to function correctly. Homeowners should have their furnace serviced by a professional at least once a year to ensure it performs at its best. Regular maintenance can prevent many of the issues listed above and extend the life of the furnace.

Furnaces are complex systems that require regular maintenance to operate at their best. Homeowners should be aware of the most common problems with their furnaces and take steps to prevent them from occurring. A furnace can provide reliable and efficient heating for many years with proper care and maintenance.