Your furnace can fail at any time, usually when you’re least prepared for it. It helps to recognize the silent signs your furnace is failing, so you can book a replacement as soon as possible.
7 Silent Signs Your Furnace is Failing
- Yellow pilot light
Newer furnaces don’t have pilot lights anymore, but many older homes still come with constant flame or “standing pilot” heating systems. You may experience issues with these systems, such as the pilot light repeatedly turning on and off, but more often than not, they can still be fixed.

However, a yellow pilot light suggests an imbalance of the gasses working inside your unit. Carbon monoxide may leak into your home.
- More expensive heating costs
An inefficient furnace will use up more energy but still won’t get the job done. If your furnace requires repair or maintenance or is nearing the end of its lifespan, it’s expected to perform poorly.
- Reduced indoor air quality
Dust, mold, and other airborne contaminants can be released into your home if your furnace isn’t working properly. This can aggravate allergy symptoms.
- Hold and cold spots
Airflow problems often result in hot and cold spots in the house. A room may be getting too much airflow, while the other isn’t getting enough airflow. Or, both rooms may not be getting enough airflow.
But if your furnace is struggling to circulate warm air evenly, it’s probably losing its heating capacity. This issue will keep getting worse until your furnace runs itself down.
- Unpleasant odors
Does your furnace smell like sewer or rotten eggs? It may be due to a failed heat exchanger, which can pump unsafe levels of carbon monoxide into your home.
- Old age
As your furnace ages, it becomes less efficient, even if you diligently maintain it. If your furnace is more than 10 years old and the warranty has expired, it’s more likely to fail or require more frequent repairs.
- Short-cycling
When your furnace gets stuck in a start-stop pattern or goes on and off too often, it can be due to a number of reasons, including a dirty blower wheel. With dirty blower wheels, your furnace can’t work efficiently.
HVAC Maintenance Near Me: Reliable furnace repair
A fully functional furnace means greater comfort. When your unit is diligently maintained, you’re less likely to find yourself without heat when you need it the most.
However, if your unit is showing signs of failure, a Good Guy is here to help. We’ll thoroughly examine your furnace and complete the necessary repairs right away, with as little downtime as possible. We see to it that your furnace can keep your home warm all winter long.
Our experienced furnace technicians install, maintain, repair, and replace HVAC systems quickly and efficiently. Since 2014, we’ve helped thousands of homeowners like you, and we’re great at what we do.
For all your furnace maintenance or repair needs, book us through the Good Guys Home Services Mobile app or fill out our online form for faster service.