Why Pre-Winter Preparation Matters
The first cold snap often brings a surge in furnace repair calls. Many of these emergencies could have been prevented with simple pre-season preparation. Here's how to ensure your furnace is ready when temperatures drop.
Safety First: Carbon Monoxide
Before anything else, ensure your home has working carbon monoxide detectors:
- Test existing detectors
- Replace batteries
- Install detectors on each floor if you don't have them
- Replace detectors older than 5-7 years
A cracked heat exchanger can leak carbon monoxide – an odorless, deadly gas. Professional inspection includes heat exchanger examination.
DIY Pre-Winter Checklist
1. Replace the Air Filter
Start the season with a fresh filter. During heating season:
- Check monthly
- Replace every 1-3 months
- Upgrade to MERV 11+ for better filtration
2. Test the System
Before you need it:
- Set thermostat above current room temperature
- System should start within a few minutes
- Air from vents should be warm within 5-10 minutes
- Listen for unusual sounds
- Check for strange smells (slight burning smell initially is normal for first use)
3. Clear the Area Around the Furnace
Ensure at least 3 feet of clearance around the furnace. Remove:
- Stored boxes and items
- Flammable materials
- Anything blocking airflow
4. Check Vents and Registers
- Open all registers (closing them doesn't save energy)
- Vacuum dust from covers
- Ensure furniture isn't blocking vents
5. Inspect the Flue/Exhaust
For gas furnaces, check that:
- The flue pipe is securely connected
- No visible corrosion or holes
- No bird nests or debris blocking the exhaust
6. Check the Thermostat
- Install fresh batteries
- Verify programming is correct for heating season
- Clean dust from around the unit
Professional Maintenance
Annual professional maintenance should include:
- Heat exchanger inspection (critical for safety)
- Burner cleaning and adjustment
- Flame sensor cleaning
- Blower motor and belt inspection
- Electrical connection check
- Gas pressure verification
- Carbon monoxide testing
- Efficiency measurement
Warning Signs That Need Immediate Attention
Call a professional if you notice:
- Yellow or flickering pilot light (should be blue)
- Soot or rust around furnace
- Excessive dust or dry air
- Furnace cycles on and off frequently
- Rooms heating unevenly
- Strange sounds (banging, squealing, grinding)
- Any smell of gas
- Family members experiencing headaches or flu-like symptoms
Efficiency Tips for Winter
Thermostat Settings
- Daytime (home): 68-70°F
- Sleeping: 65-68°F
- Away: 62-65°F
- Each degree lower saves 1-3% on heating costs
Additional Measures
- Use ceiling fans (clockwise on low) to push warm air down
- Check weatherstripping on doors and windows
- Keep blinds open on sunny days for solar gain
- Close blinds at night for insulation
Bay Area Winter Considerations
Our mild winters mean:
- Furnaces may sit unused for months, then run continuously during cold snaps
- Short, intense usage can reveal problems
- Heat pumps are excellent alternatives for our climate
- Many homes have older, less efficient furnaces that haven't been replaced due to light usage
Emergency Preparation
Before winter, know:
- How to safely shut off gas and power to your furnace
- Where your main gas shutoff is located
- Who to call for emergency service (keep our 24/7 number handy)
- How to safely use backup heating if your furnace fails
Schedule Your Tune-Up Now
Fall is the best time for furnace maintenance:
- Technicians are less busy than during cold weather emergencies
- You'll have time to address any issues found
- Your system will be ready when you need it
Don't wait for the first cold night – schedule your furnace tune-up today.