4 Issues That Cause Your Furnace To Keep Shutting On and Off

Over the past few years, homeowners have shifted their focus more on energy efficiency, and for a good reason.

As we are edging closer to inclement weather, the discussion about furnaces is a must. One of the topics that are often out of talks is furnace short cycling. A short cycling furnace turns on and then turns off before it has heated your home to the thermostat set point. Seldom, a short cycling furnace won’t make any heat at all before shutting down.

Most cases with regards to this issue are easy to fix. The last resort can be costly because it requires replacing the furnace. Nevertheless, it is best to check these potential other causes before being concerned you’ll have to replace the furnace. Four of the most common reason for short cycling furnace are listed below:

Wrong thermostat placement

Thermostats read ambient air temperatures and relate that information to tell themselves to cycle on and off. A poorly-placed thermostat may cause it to read an inaccurate ambient temperature — making the thermostat run either too often or inadequately. Needless cycles cause unnecessary wear and tear on your HVAC system, resulting in uneven heating or cooling and lead to higher energy bills. The fittest place for your thermostat is on an interior wall, away from direct sunlight, air vents, your kitchen, hallways, windows, and doors. Ideally, its placement should be toward the center of your home.

Wrong furnace size

Finding an adequately sized furnace helps homeowners avoid a common issue. A furnace that is too large for space will short-cycle, causing increased wear and tear on the unit and spikes in electricity. A furnace that is too small for an area will run continuously during cold weather, resulting in higher energy consumption and increased costs.

Dirty air filter

Your furnace is assumed to cycle on and off occasionally throughout the day, but dirty air filters can make those cycles more prevalent than they need to be. If dirty and clogged, a filter restricts airflow, which causes your whole HVAC system to run less efficiently. The neglect of air filter maintenance is one of the leading causes of short cycling. Change your air filter according to the manufacturer’s instructions, and make sure to check it once a month and change it if it is dirty.

Dirty furnace flame sensor

The flame sensor in your furnace is a safety mechanism that secures the gas that feeds your furnace is being burned and not lost into the ventilation system. The sensor detects when there is a burning flame inside the burner assembly of your furnace. If no fire is detected, the sensor shuts off the unit to prevent unburned gas from being squandered into the vent system or chimney.

While most homeowners take the initiative in fixing issues with their furnaces, some opt to go the hassle-free and secure way. A qualified HVAC professional helps you determine your furnace’s needs and keep it running in peak condition. Blue Sky Heating and Air LLC have everything you will ever need when it comes to high-quality HVAC services.

Remember, a helpful rule of thumb is to have your furnace professionally inspected annually. This practice can ensure your furnace’s safety and furnaceefficiency while likely avoiding expensive repairs further down the line.
Don’t hesitate to contact Austin’s trusted HVAC company at (512) 222-6666 or fill out our Request Service form to get started with your comfortable, warm home.

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