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What Are The Most Common Furnace Issues, & What Can You Do About Them?

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When your furnace is working correctly, it’s like it’s not even there. But when it fails, the common furnace issues can be like a big elephant in the room, shutting down your heat, lowering your air quality, or even causing damage to your home.

You can usually avoid being blindsided by these issues by having regular furnace tune-ups, but breakdowns do happen, and they can happen at the worst of times. So, what are the most common furnace problems you may experience, and what can you do to prevent them from happening? 

The team at Action Furnace are leaders in home comfort, and we want every person we serve to have detailed knowledge of their furnace system. With our help, you can make the right choices for your family, home, and wallet.

Technician testing furnace using ammeter

Poor Air Quality? Change Your Air & Furnace Filters

Air and furnace filters are some of the easiest things to replace as a homeowner, but it can also be one of the first things you may overlook. Filters collect a range of harmful contaminants in your air, from particulates caused by dust and smoke to volatile organic compounds (VOCs) released by different materials we may use for home maintenance.

The quality of your filter can also have a significant impact on your air quality. To be sure you’re protecting your home, check out the MERV rating on your air filter. Lower quality filters generally range between a MERV rating between 1 and 5, while high-quality filters have MERV ratings between 11 and 16!

No Power to Your Furnace? Check Your Fuse Box or Thermostat

Sometimes your furnace problem might not be the furnace itself. HVAC systems are designed with complex wiring that allows you to control your heat from your thermostat, but if the wiring is faulty or if your breaker short circuits, your furnace might completely fail to start.

If your furnace isn’t powering on, spend a few minutes taking a look at your circuit breaker and thermostat. It may seem cliché to say, but turning these off and on again might do the trick! In other cases, dirty furnace filters or even dead thermostat batteries can also prevent your furnace from turning on. 

If you do not see any results after checking these components, you may need to contact our professionals for a more in-depth look.

No Heat, But the Furnace is On? Your Blower Motor Might Be The Culprit

Common Furnace Issues

Furnaces use blower motors, or fans, to help push heat all around your home. But when this device malfunctions, you’ll have no heat and soaring utility bills from trying to run your furnace all day! Now, there could be a couple of reasons why you may be experiencing blower motor failure, but one of the most common is overheating.

Overheating can be caused by:

  • Dirty filters
  • Lack of care
  • Old age

You can go about solving the dust and dirt problem by replacing your furnace filter, but professional furnace tune-ups can address all 3 of these common furnace issues and ensure the blower motor is working at peak capacity.If overheating isn’t what’s wrong, then it could be the communication between your furnace and thermostat. Thermostats generally have “On” and “Auto” features for the blower motor, but if your thermostat isn’t wired correctly to your furnace, it could fail to trigger these options for you.

Loud Screeching or Scraping Sounds? Your Blower Belt Might Be Loose

Staying on the topic of blower motors, there are 2 types your furnace could use: direct drive and belt drive motors.

The former is one of the more common, as they cut the middle man out between the belt and the fan and just powers the fan directly (as you could probably guess by the name). The latter, you guessed it, uses a belt system to power the fan.

Neglecting to maintain your blower belt could result in deterioration, leading to awfully loud screeching that could rival The Wicked Witch of the West. Annual tune-ups can help diagnose these common furnace issues before they start affecting your home comfort, and our team can even provide you with tips on how to inspect your blower belt so you can get ahead of the problem before it happens.

The Furnace is Working, But You Still Have Poor Heating? Your Ducts May Be Clogged or Damaged

If you place your hand over your furnace registers and feel a faint instance of heat, but everything in your furnace is working correctly, you may need to look at getting your air ducts cleaned.

Your air ducts are responsible for delivering heat all over your house. But over time they can accumulate a substantial amount of dust, especially if your furnace/air filters haven’t been cleaned or replaced in a long time.

A more severe problem could be that your ducts are damaged, disrupting the airflow in your HVAC system. In either case, you will need to contact our professionals to diagnose the cause and find solutions you can trust.

Your Furnace Experts Are Only a Phone Call Away

Even if you think your issues are relatively minor, there is no replacement for having a certified professional take a look at your furnace system. With the help of our comfort and advisors and trained professionals, you can get back to enjoying your home heating.

Please, give our team a call today!

Written by Ryan Tutak

Ryan is considered one of Calgary's most knowledgeable residential HVAC specialists. Working in the industry for over 12 years, he's helped thousands of homeowners with their heating and cooling systems. Outside of running Calgary's most reputable HVAC business, you can find him on the Golf course practicing his short game or traveling with his family. His main goal is to create a positive collaborative culture, one in which his employees are excited to come in and are motivated to work hard. He spends the majority of his day working directly with Home Comfort Advisors, Service and Maintenance Technicians, and Customer Service Representatives ensuring they are fully prepared to lead the Home Service Industry in Customer Service.

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