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6 Signs You May Need a New Furnace Fan

May 16, 2023

Even though our Phoenix summer heat takes the spotlight, we have our fair share of cold nights—that’s why your furnace is just as important as your AC. There are many things that can go wrong with your furnace, and the fan (a big component of the furnace) can be the culprit of several problems. Sometimes, your furnace will keep running, even if the thermostat is off, or your furnace fan will blow constantly. Aging furnace motors, once they start to go bad, will likely continue to malfunction.

Constantly having to pay for furnace repairs can be a drain on your finances, and replacing your fan motor can be unnecessarily expensive. If you’re regularly paying to replace your furnace fan, schedule an appointment with a Patrick Riley Heating expert to discuss your cost-saving options.

#1 - The Furnace Fan Is Blowing Constantly

If your furnace fan is blowing constantly, something is wrong. When your fan runs continually, it wears out faster than it otherwise would. Plus, it’s inefficient and costs you more money on your energy bills. There are a few reasons why your furnace fan may be blowing constantly, including incorrect thermostat settings or a short in the wiring.

Learn more: Why Does My Furnace Keep Running?

#2 - There Is Poor or No Airflow From Air Vents

Poor or no air flow from your furnace fan vents will be one of the most obvious signs that your blower motor has a problem. If there’s no air or very weak airflow coming from your unit, the motor may be clogged, or it may be malfunctioning. If the motor has been overheating, has been saturated with moisture, or is nearing the end of its service life, it might need to be replaced. A Patrick Riley Heating expert can tell you exactly what the issue is if you’re experiencing weak airflow.

#3 - There Are Noises Coming From Your Furnace

Any time your furnace is making noises you don’t normally hear, it’s time to call in a Patrick Riley Heating expert to help you diagnose the problem. While rattling may be signs of loose components, an expert should check any banging sounds right away, as this could be something more serious. If your furnace fan is blowing constantly and noises are coming from your furnace, connect with a trusted HVAC professional for help.

Learn more: Why Is My Furnace Making a Loud Noise?

#4 - You Have to Frequently Adjust Your Thermostat

Thermostats control the temperature in your home, and there are many reasons why you might have to continuously adjust it. When your furnace fan keeps running with the thermostat off, or if it won’t hold the temperature you’ve set it to, this could be a sign that your blower motor isn’t functioning properly and needs to be inspected by a professional. If you find yourself headed for your thermostat multiple times a day, call a Patrick Riley Heating expert to help diagnose your furnace issues.

#5 - The Furnace Is Not Turning On

As your furnace ages and parts begin to wear, a worn furnace motor blower could be the explanation for why your unit won’t power on. If you have to keep powering on your furnace throughout the day, it’s definitely time to have it inspected by a Patrick Riley Heating professional.

#6 - The Furnace Is Old

On average, Arizona furnaces last between 15 and 20 years. With good maintenance and regular checkups, you can help extend the life of your furnace—but it won’t last forever. The time will eventually come when you’ll start dealing with more frequent breakdowns and issues, and this is a good time to have your unit inspected and discuss your options for a new furnace installation.

Why Choose Patrick Riley Cooling, Heating, & Plumbing?

Whether you’re experiencing a furnace fan that’s blowing constantly, a running furnace with the thermostat off, or another issue with your furnace, Patrick Riley Cooling, Heating, & Plumbing can help. With years of experience helping Phoenix homeowners, we have the knowledge and training necessary to diagnose and repair any furnace issue you’re facing.

AZ HVAC & Plumbing Service Area

Written by: Patrick Riley Cooling, Heating, & Plumbing

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By Ty Lindsay

Ty Lindsay is the Director of Field Operations at Patrick Riley | Isley’s and a 15-year veteran of the plumbing and HVAC trades. In 2010, Ty earned his Journeyman’s plumbing license. He became a Master Plumber five years later and earned his Journeyman HVAC technician’s license that same year. Ty’s breadth of knowledge in plumbing and HVAC includes both residential and commercial work. He’s been a loyal member of the Patrick Riley | Isley’s team since 2016.