Overview
Gas furnaces are a common heating solution in homes, but they are complex systems requiring regular care. Without proper maintenance, they can develop serious issues that compromise safety, efficiency, and comfort.
Common Gas Furnace Failures
1. Cracked Heat Exchanger
- Symptoms:
- Pilot light won’t stay lit.
- Yellow flame instead of blue.
- Carbon monoxide (CO) detectors activate.
- Cause:
- Age, overheating, or manufacturing defects.
- Risk:
- CO leaks into your home, posing life-threatening risks.
- Prevention:
- Annual inspection by a licensed technician to check for cracks or corrosion.
2. Gas Leaks
- Symptoms:
- Smell of natural gas (rotten egg odor).
- Hissing sounds near the furnace.
- Cause:
- Loose connections, damaged valves, or corroded lines.
- Risk:
- Fire, explosion, or CO buildup.
- Prevention:
- Test gas lines and connections during maintenance.
3. Faulty Ignition System
- Symptoms:
- Furnace won’t start.
- Repeated pilot light failures.
- Cause:
- Worn-out ignitor, faulty sensors, or electrical issues.
- Risk:
- System may not ignite, leaving you without heat.
- Prevention:
- Check ignitor and sensors during seasonal service.
4. Dirty Air Filters
- Symptoms:
- Reduced airflow.
- System cycles on and off frequently.
- Cause:
- Clogged filters restrict airflow, overworking the blower motor and heat exchanger.
- Risk:
- Overheating, higher energy bills, or system failure.
- Prevention:
- Replace filters every 1–3 months.
5. Blocked or Leaky Ducts
- Symptoms:
- Uneven heating.
- High energy bills.
- Cause:
- Ducts lose heat or allow air leaks.
- Risk:
- Inefficient heating, higher costs, or system strain.
- Prevention:
- Seal and insulate ducts during maintenance.
6. Clogged Burners or Gas Valve Issues
- Symptoms:
- Weak or inconsistent heat.
- Furnace runs but doesn’t warm the home.
- Cause:
- Dirt, debris, or faulty gas valves.
- Risk:
- Inefficient combustion, safety hazards.
- Prevention:
- Clean burners and check valves annually.
7. Venting System Problems
- Symptoms:
- Furnace won’t ignite.
- Soot buildup.
- Cause:
- Blocked vents, cracked flue pipes, or improper installation.
- Risk:
- CO buildup, fire hazards.
- Prevention:
- Inspect vents and flue pipes during seasonal checkups.
Why Seasonal Maintenance Matters
1. Safety First
- **Prevents CO leaks, gas issues, and fire risks.
- **Early detection of cracks, leaks, or faulty components.
2. Efficiency & Cost Savings
- **Clean filters, coils, and ducts reduce energy use by 10–15%.
- **Proper combustion and airflow improve performance.
3. Longevity
- **Regular service extends furnace life by 10–15 years.
- **Catches minor issues before they become major repairs.
4. Warranty Compliance
- **Manufacturer warranties require annual maintenance.
- **Neglect voids coverage.
5. Avoid Emergency Repairs
- **Proactive checks prevent breakdowns during cold snaps.
- **Reduces downtime and costly fixes.
Seasonal Maintenance Checklist
| Task | Why It Matters |
|---|---|
| Inspect and replace air filters | Prevents airflow restriction and system strain. |
| Check gas connections and valves | Ensures safe, consistent operation. |
| Clean burners and heat exchanger | Improves combustion and efficiency. |
| Test ignition system | Prevents start-up issues. |
| Inspect ducts and vents | Reduces energy waste and safety risks. |
| Verify thermostat and sensors | Ensures accurate temperature control. |
| Check for CO leaks | Protects your family and home. |
| Lubricate moving parts | Reduces wear and noise. |
| Test blower motor and fan | Ensures even heat distribution. |
| Inspect electrical connections | Prevents system failure. |
When to Call a Technician
- Furnace won’t start
- Strange smells or sounds
- Inconsistent heating
- High energy bills
- CO detector activation
- Visible soot or rust
Why Choose Only Way Air for Gas Furnace Maintenance
- EPA-certified technicians
- Code-compliant service
- 1-year labor warranty
- 24/7 emergency service
- Local expertise (Arlington, Fort Worth, DFW)
Only Way Air – Keeping your home safe, warm, and efficient.
FAQ
Q: How often should I get my gas furnace serviced?
A: Annually, before the heating season.
Q: What happens if I skip maintenance?
A: Higher bills, safety risks, and shortened lifespan.
Q: Can I do this myself?
A: No. Gas systems require licensed professionals for safety and compliance.
Q: How do I know if my furnace is leaking CO?
A: CO detectors, yellow flames, or soot buildup.
Q: What’s the cost of maintenance?
A: 150 (varies by system and quantity).