Why Does My Furnace Fan Run Constantly?

  • or Call 252-222-0026

hvac repair men

Furnace fans work in conjunction with other heating and cooling systems to provide even temperatures throughout your home. A few minutes before heating or cooling begins, the fan may come on.

Many people are unsure if it’s safe to leave their furnace fan “on” all the time. Do you want to know the merits and demerits of doing so? Find out if constantly running your furnace fan is something you should think about and what precautions you should take before doing so.

Blower fans function with heating and cooling systems, although they’re essentially on their electrical circuit. The air within your furnace and air conditioner is heated and cooled. Blower fans are responsible for removing stale air from your home, redistributing it through your air conditioner or furnace, and then redistributing it again. The thermostat is the command center for all of these systems.

While in “auto” mode, a thermostat tells both the blower fan and the heating or cooling components to come on and go off simultaneously when the target temperature is attained. Many HVAC systems use a blower fan to circulate air for about a minute before heating or cooling begins and stops. To temporarily boost air circulation, flip the thermostat switch “on,” and your blower fan should run on its own. Otherwise, it should not be running on its own.

Check your Thermostat Settings

Be sure your thermostat is adjusted appropriately first and that the fan will not run nonstop due to constant heating. To fix the problem, follow these steps:

Lower the temperature on your thermostat

In this way, you prevent your thermostat from requesting extra heat and shutting down the furnace. Wait for 3 to 4 minutes for the blower fan to stop working if the stove was in the middle of a heating cycle. Has the blower on your furnace stopped working? As a result, your furnace will continue to heat up as it tries to reach the target temperature you’ve chosen. Un-weatherized homes, which allow cold air in while hot air escapes, can also cause your furnace to run constantly.

Set your fan to AUTO rather than ON

It doesn’t matter whether your heater is heating up or not if your fan is ON. Please don’t leave your lover set to ON because it wastes energy by making the fan motor run all the time.

Consult a specialist if your furnace is constantly heating but not reaching the setting you’ve selected. They can suggest solutions.

Pros and Cons of Running your Furnace Fan

You may have noticed that your HVAC system’s blower has a fan setting when glancing at the thermostat controls in your home. This blower aids in circulating hot or cold air throughout your house until the thermostat desired temperature. Homeowners may not be aware; there are two fan settings:  ‘on and auto.’

On: Pros and Cons

One benefit of turning on your HVAC blower is that it will operate continuously and distribute warm or cold air evenly around your home, reducing hot or cold patches. If you set your HVAC blower to on, you’ll:

  • Save money on your fan’s lifespan
  • Reducing the number of times it begins and stops
  • Improve your indoor air quality if a filtration

Leaving your HVAC fan on has a few drawbacks; for example, if your fan is on all the time, your:

  • Energy costs could go through the roof, costing you a lot of money over time.
  • Additionally, since your furnace filter is dragged through, you’ll have to replace it more frequently.

Auto Pros and Cons

The autonomous operation of your HVAC blower comes with its own set of benefits. One of the benefits is that it:

  • It uses the least energy because the fan only runs when the system is auto. Aside from that,
  • Lets moisture from your cold cooling coils drops and drains outside, which helps dehumidify your home throughout the summer.

Likewise, setting your HVAC fan to auto has the drawback of resulting in:

  • Uneven air distribution across your home.
  • To keep your furnace from using more energy,
  • May result in replacing your furnace filters frequently.

Reasons Why Your Furnace Fan Might Run

Continuously using your furnace fan isn’t necessarily a bad thing. Because it’s built to run continuously, the fan will never wear out or break down, which has various advantages. Here are just a few of the many possibilities:

Make Your Device Last Longer

It’s a common misconception among homeowners that constantly using their furnace fan can shorten its lifespan. Contrary to popular belief, this is not the case. As long as your system is built correctly with the correct ductwork size, these fan systems will run constantly.

Improved airflow

Hot air rises to the roof and attic because it is lighter than cold air, while cold air falls to the ground. A technique through which your fireplace draws smoke from the chimney is the same as this. As a result, many homes have cold basements and warm upper floors.

Improve the Environment’s Quality of Air

Continuously blowing air through your furnace filter is equivalent to constantly running the furnace fan. With UV light and a good filter, you can clean the air all the time. As a result, your family will breathe more accessible, and your home’s furniture will have less dust.

Reduced monthly utility costs

Modern ENERGY STAR-rated furnaces contain a variable-speed motor designed to run continuously rather than intermittently. Because ENERGY STAR products adhere to EPA energy efficiency standards, your furnace will use less energy to complete the same duty, reducing energy waste and your long-term power costs.

How to Turn Off Your Furnace Fan

The most typical cause of an unresponsive Air Conditioner fan is a jammed relay, which prevents the circuit from opening. Even if the problem isn’t with the relay, it may be with a fast connection or a bad thermostat.

Check the thermostat settings first before hiring a service professional to begin replacing parts. If you want the air conditioner to shut off, set the thermostat higher. Then

Step 1: Look for the fan limit switch on your ceiling fan.
Step 2: Do not push the white button in step two
Step 3: If the fan is still operating after step 2, contact a technician.

If your furnace fan still doesn’t shut off, contact us for assistance. Get in touch with us, and we’ll dispatch a skilled technician to your location as soon as possible.

Coastal Home Services

If you are having issues with your furnace, you should have it fixed as soon as you notice something is wrong. At Coastal Home Services in Morehead City, NC, we can help you solve any type of HVAC system issues you may have. Please don’t hesitate to contact us today via the contact form below and we will be in touch with you shortly.

Contact Us with Questions or comments

Latest Posts

Why is My AC Drain Pan Full of Water?

After tiring business hours, following a long day at work, your home air conditioner isn’t operating as expected. The drain…

Why Does My Furnace Fan Run Constantly?

Furnace fans work in conjunction with other heating and cooling systems to provide even temperatures throughout your home. A few…

HVAC Filter is Not Getting Dirty: Is That Bad?

In many cases, buying a house is the most expensive investment you’ll ever make financially. Do you know only HVAC…

What Causes Furnace Ignitor Failure?

When many homeowners switch on their furnace but fail to ignite the time you need it most, consider some simple…
Scroll to Top

Get Your Free Estimate Today!

Once received a member of our team will be in touch to finalize your estimate appointment details.