The Complete Fall Furnace Maintenance Checklist
Here’s a comprehensive list of tasks to help you get your heating system ready for winter:
1. Replace or Clean the Air Filter
A clogged air filter restricts airflow, reduces efficiency, and can even cause your furnace to overheat.
Frequency: Every 1–3 months
Tip: Use high-efficiency filters (MERV 11+) for better dust and allergen control
2. Check the Thermostat Settings
Ensure your thermostat is set to “heat” and programmed to a comfortable temperature.
- Upgrade to a smart thermostat for better control and energy savings
- Calibrate your thermostat if room temps feel inconsistent
3. Inspect and Clean Vents & Registers
Blocked or dirty vents reduce airflow and make your system work harder.
- Remove any dust or debris
- Make sure furniture, curtains, or rugs aren’t blocking airflow
4. Clear the Area Around the Furnace
Furnaces need proper clearance for safe operation.
- Remove any storage boxes, tools, or flammable materials nearby
- Vacuum dust and cobwebs around the unit
5. Test the Carbon Monoxide Detector
Furnaces can develop cracks in the heat exchanger, potentially leading to carbon monoxide leaks.
- Replace batteries in all CO detectors
- Test alarms to ensure proper function
Tip:
Place one near each bedroom and on every floor of your home
6. Inspect the Pilot Light or Ignition System
If you have a gas furnace, the pilot light or igniter must function reliably.
- Check for steady blue flame (yellow/orange indicates a problem)
- If it won’t light or stay lit, schedule a service call immediately
7. Listen for Unusual Noises
Loud bangs, rattles, squeals, or grinding sounds may indicate mechanical issues or worn parts.
- Address noises early to prevent more serious breakdown
- Don’t ignore persistent sounds—they usually get worse over time
8. Check for Signs of Rust or Corrosion
Rust on or around the furnace may point to internal leaks or aging components.
- Check vent pipes and connections for corrosion
- Call for service if rust is visible inside the cabinet
9. Lubricate Moving Parts
Furnace motors, fans, and bearings require proper lubrication to operate efficiently.
- Lack of lubrication increases friction and wear
- A technician can apply furnace-grade lubricants during a tune-up
10. Schedule a Professional Furnace Tune-Up
Even if your furnace seems to be working fine, professional maintenance ensures that all internal components are clean, safe, and functioning properly.
At Generation Air Conditioning & Heating, our fall furnace tune-ups include:
- Full system inspection
- Burner and heat exchanger cleaning
- Filter replacement
- Safety control testing
- Gas pressure and airflow checks
- Thermostat calibration
- System performance testing
