Furnaces are easy to forget about — until the first cold snap of the year, when you need one working perfectly. The good news is that most furnace failures are preventable with a simple, predictable maintenance schedule.
The Short Answer: Once a Year
Most manufacturers, and most licensed technicians, recommend a full furnace inspection and tune-up once a year, ideally in early fall before the heating season starts. This gives you time to fix anything that turns up before you actually need the system running around the clock.
What a Furnace Tune-Up Actually Covers
A proper annual service isn't just a quick look — it should include:
- Cleaning or replacing the air filter
- Inspecting the heat exchanger for cracks or corrosion
- Testing the ignition system and burners
- Checking gas pressure and combustion levels
- Verifying carbon monoxide levels are safe
- Lubricating moving parts and checking the blower motor
Between Visits: What You Can Check Yourself
You don't need a technician for everything. Check (or replace) your air filter every one to three months during heavy use — a clogged filter is one of the single biggest causes of reduced efficiency and early wear. It's also worth keeping the area around your furnace clear, and listening for any new rattling, banging, or squealing sounds, which are often the first sign something needs attention.
Signs Your Furnace Needs Service Now — Not Later
- Uneven heating between rooms
- A yellow (instead of blue) burner flame
- Rising energy bills with no change in usage
- The system short-cycling (turning on and off frequently)
Why Annual Service Pays for Itself
A well-maintained furnace runs more efficiently, lasts longer, and is far less likely to fail on the coldest night of the year — when emergency repairs cost the most and take the longest. It's also the easiest way to catch a small issue before it becomes a full system replacement. See our full heating services, or book your fall tune-up before the season fills up.