Common Reasons Why Your Furnace Keeps Shutting Off

Do you find that your furnace turns off and on frequently? This condition is known as short cycling, and it’s important that you quickly discover and resolve the problem. Not only is this cycling annoying to the ear, it’s also inefficient and can easily lead to costly repair or replacement needs.

Airflow Restriction

One of the more common causes of short cycling is a dirty air filter. Such a problem would actually qualify as good news since replacement is relatively inexpensive. Be sure to check the condition of your filter every thirty days. Mildly soiled filters may be rinsed with water, so replacement isn’t always a necessity. Always remember to turn your furnace off before beginning inspection or maintenance for reasons of safety.

As you might expect, closed or blocked vents also restrict airflow to your furnace. Make sure there are no obstructions, and you’ll want to keep vents open even in potentially unused rooms of your home. Also, avoid positioning furniture and appliances close to vents or blocking vents with rugs. Too little airflow leads to an inefficient furnace and thus higher costs in the long run.

Keep in mind that airflow out is important, too. Be sure that nothing has blocked your exhaust vent, such as dirt or leaves from the outside world.

Thermostat Issues 

You’ll want to check your thermostat to make sure it’s set to the proper temperature. The solution might be that simple. If the setting is correct, a good follow-up step is to check that the thermostat isn’t in direct sunlight or close to another heat source that might give it a false impression of your home’s temperature.

Furnace Size

You might assume that a hefty furnace would be ideal, but if it’s too big, you’ll find that your home heats up too quickly. The off-and-on repetitiveness that results often leads to the need for replacement. Be sure to take your home size into account when investing in a furnace.

Flame Sensor

If the flame sensor has become dirty or nonfunctional, it could mistakenly detect that your furnace’s flame has gone out. In this case, it will automatically turn your furnace off as a protective measure.

The Takeaway

The possible costs of short cycling run the gamut. A little preventative maintenance and forethought can go a long way towards avoiding larger and more expensive issues later on.

For more information on the matter, contact Cascade Mechanical at (509) 642-6383