5 Common Reasons Your HVAC System Breaks Down

There are usually a few beautiful days throughout the year when you may not need to run your HVAC equipment for indoor climate control. However, most of the year, you may need it to function reliably in order to remain comfortable in your home. During extreme temperature situations, the use of your HVAC equipment may be imperative for your family’s well-being. Understanding the common reasons why HVAC systems may not work as needed can help you to prevent some issues and to address issues quickly when they do arise.

Poor Maintenance

Replacing your HVAC equipment’s air filter regularly is one of the most important and easiest steps that you can take to prevent unnecessary wear. The air filter keeps dirt and grime out of the equipment to promote superior efficiency. Air filters should be replaced monthly in most cases. You also should schedule annual maintenance service with an HVAC technician.

Thermostat Issues

Your thermostat provides you with direct control over the temperature in your home as well as how frequently and how long the HVAC system runs. The batteries in your thermostat will die from time to time and must be replaced. In some cases, thermostats simply die themselves, and the entire unit must be replaced. If your HVAC equipment is not responding to your directions via the thermostat, you may consider replacing the batteries as a quick-fix solution before scheduling AC and heating repair service.

A Blown Fuse

If the equipment is non-responsive, you should also check your fuse box. A blown fuse is easy to stop and quick to repair on your own. If your fuse blows frequently, you may need to schedule a diagnostic service with an electrician rather than an HVAC technician.

Damaged Components

Even when you take great care of your HVAC system, its many components will eventually wear out. This is the case with all types of mechanical components in any smaller or larger device. If your troubleshooting efforts do not produce essential results, a technician should be called to perform a diagnostic on the system.


HVAC equipment may need to be replaced every 10 to 15 years in most cases. Exceptional maintenance may enable you to extend the life further. However, if your system is older and frequently breaks down, you may schedule replacement service with an energy-efficient model that is under warranty.

Most HVAC system issues are related to one of these reasons or a combination of them. You can easily check the thermostat and circuit breaker yourself in a matter of minutes. Your home can grow uncomfortably warm or cold within a relatively short period of time in some cases, so you should not delay contacting an HVAC technician as needed.


Addy Reeds is a freelance writer from Eugene, Oregon. She discovered her passion for journalism while attending the University of Oregon. Follow her on Twitter and Facebook: @addyreeds1; https://www.facebook.com/addy.reeds


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