Gas appliances do a lot of heavy lifting in your home. They heat water, cook food, and keep the air warm in winter. However, like any machine, they require regular maintenance. Or else, they’ll break down eventually. In the worst cases, a faulty gas appliance can put your family at risk.
A yearly inspection helps you spot problems early and keep everything working as it should.
Here’s a clear, step-by-step checklist for your annual gas appliance inspection.

Why Annual Gas Appliance Inspections Matter
Gas appliances can develop issues you won’t see or smell. Small leaks, blocked vents, or worn parts can lead to bigger problems, sometimes even dangerous ones. An annual inspection helps you:
- Catch gas leaks before they become emergencies.
- Prevent carbon monoxide from building up inside.
- Extend the life of your appliances.
- Keep your home running efficiently.
What to Inspect: The Core Areas
1. Gas Lines and Connections
Start by checking all visible gas lines and connections for signs of wear, corrosion, or leaks. If you notice a rotten egg smell or hear hissing, act fast and call a professional. Even if you don’t spot anything, it’s smart to have a qualified technician use specialized equipment to check for invisible leaks.
2. Appliance Burners
Look at the burners on your stove, furnace, water heater, or fireplace. They should burn with a steady blue flame. Yellow or flickering flames can mean incomplete combustion, which wastes gas and can create carbon monoxide.
3. Vents and Flues
Blocked vents or flues can trap dangerous gases inside. Inspect for bird nests, debris, or rust. Make sure all venting is secure and clear.
4. Safety Devices
Modern gas appliances have built-in safety features-like shutoff valves, pressure relief valves, and flame sensors. Test these to confirm they work if you’re not sure how, have a professional handle it.
5. Carbon Monoxide Detectors
Every home with gas appliances needs working carbon monoxide detectors. Test them during your inspection and replace batteries if needed.
Step-by-Step Inspection Checklist
A. Visual Inspection
- Check all appliances for signs of wear, rust, or damage.
- Look for loose or disconnected pipes.
- Inspect the area around appliances for soot, scorch marks, or moisture.
B. Leak Detection
- Use a gas leak detector or soapy water to check connections. Bubbles mean a leak.
- Listen for hissing sounds near pipes or appliances.
C. Burner and Pilot Light Check
- Ignite each burner and observe the flame.
- Clean burners if the flame is yellow or uneven.
- For pilot lights, make sure they stay lit and are not flickering.
D. Vent and Flue Inspection
- Check that all vents and flues are clear of debris.
- Inspect for corrosion, holes, or loose fittings.
- Confirm that the vent pipes slope upward and are securely attached.
E. Filter Cleaning
- Replace or clean filters on furnaces and other appliances.
- Dirty filters reduce efficiency and can cause overheating.
F. Pressure and Temperature Settings
- Verify that gas pressure and temperature settings match manufacturer recommendations.
- Adjust as needed for safe operation.
G. Safety Device Testing
- Test shutoff valves and pressure relief valves.
- Check flame sensors and thermocouples for proper operation.
H. Carbon Monoxide Detector Test
- Press the test button on each detector.
- Replace batteries or detectors that fail to respond.
I. Documentation
- Record inspection dates, findings, and any repairs made.
- Keep this record for future reference.
Signs You Need Immediate Help
Some problems can’t wait for an annual check. Call a professional right away if you notice:
- A strong gas odor.
- Hissing or whistling near gas lines.
- Soot or scorch marks around appliances.
- Pilot lights that won’t stay lit.
- Unusual condensation or moisture near appliances.
Professional vs. DIY Inspections
You can handle basic checks, such as cleaning filters and testing detectors, yourself. But for leak detection, pressure testing, and vent inspections, it’s best to hire a licensed technician. They have the tools and training to spot issues you might miss.
How a Professional Inspection Works
A technician will:
- Check all gas lines for leaks and damage.
- Inspect and clean burners, pilot lights, and ignition systems.
- Test safety devices and controls.
- Examine vents and flues for blockages or corrosion.
- Measure gas pressure and adjust as needed.
- Provide a detailed report of findings and repairs.
Keeping Your Appliances Running Longer
Regular inspections help your appliances last longer. Clean burners use less gas and create less wear on parts. Clear vents mean less risk of overheating. And working safety
Final Thoughts
A yearly gas appliance inspection isn’t just a chore. It’s a way to protect your home, your health, and your wallet. Use this checklist to stay organized. If you’re not comfortable doing it yourself, call a qualified technician.
Regular attention and close collaboration with gas experts ensure everything runs smoothly, providing you with peace of mind.