Philadelphia winters can be punishing. The last thing you want is a heating system that breaks down on the coldest night of the year — especially when a simple fall checkup could have prevented it. This checklist covers everything homeowners should address before the temperature drops.
DIY Checklist: What You Can Do Yourself
- Replace air filters — Start the heating season with a fresh filter
- Test your thermostat — Switch to heat mode and verify it responds correctly
- Check all vents and registers — Make sure none are blocked by furniture or debris
- Inspect visible ductwork — Look for obvious gaps, disconnections, or damage
- Clear around the furnace/boiler — Maintain 3 feet of clearance; remove stored items
- Test carbon monoxide detectors — Replace batteries and test all units
- Inspect the flue/chimney — Look for blockages, bird nests, or visible damage from outside
Professional Maintenance: What a Technician Checks
Annual professional maintenance prevents an estimated 85–95% of heating system breakdowns and can improve efficiency by 10–15%. During a GenServ Pro tune-up, our technicians:
- Inspect and clean heat exchanger for cracks (critical for safety)
- Test and clean burners and ignition components
- Check and tighten all electrical connections
- Lubricate all moving parts
- Measure temperature rise and compare to manufacturer specs
- Test safety and limit controls
- Check gas pressure and combustion analysis
- Inspect flue and venting for proper draft
Don't Skip the Heat Exchanger Check
A cracked heat exchanger is the most dangerous problem a furnace can have — it allows combustion gases including carbon monoxide to enter your living space. This issue is virtually undetectable without professional inspection and is why annual tune-ups are not optional for gas furnaces.
Boiler Maintenance (For Homes with Radiators)
If your Philadelphia rowhouse or older home has a boiler system, fall maintenance includes additional steps: bleeding radiators of trapped air, checking pressure and water levels, inspecting expansion tanks, and verifying all zone valves are operating properly.
Smart Timing
Schedule your heating tune-up in September or early October — before the fall rush hits. Availability is best and you'll have plenty of time to address any issues before you actually need heat. GenServ Pro typically books up quickly in late October and November, so early scheduling pays off.
Schedule Your Fall Tune-Up
Don't wait until you need heat to find out your system has a problem. GenServ Pro serves Philadelphia, the Main Line, and Delaware County.