Summary: Keep your heating and cooling system in peak condition with this complete annual HVAC maintenance checklist. Follow this guide every spring and fall to avoid expensive emergency repairs.
Spring AC Tune-Up Checklist (April–May)
- Replace or clean air filter
- Clear debris from around outdoor condenser unit
- Gently clean condenser coil fins
- Check refrigerant level and inspect lines for leaks
- Test thermostat calibration and programming
- Inspect electrical connections and capacitors
- Clear and treat condensate drain line
- Check blower wheel and motor operation
- Measure supply and return air temperature differential
- Test all safety controls
Fall Furnace Tune-Up Checklist (September–October)
- Replace or clean air filter
- Inspect heat exchanger for cracks (CO safety)
- Clean burners and test ignition sequence
- Test and clean flame sensor
- Check and adjust gas pressure
- Inspect flue pipe and combustion venting
- Lubricate blower motor bearings
- Test all safety limits and controls
- Check carbon monoxide detectors throughout home
- Test thermostat in heating mode
Year-Round Tasks
- Check filter monthly, replace as needed
- Keep vents and registers clear of furniture
- Listen for unusual sounds from equipment
- Monitor energy bills for unexplained increases
- Keep outdoor unit clear of snow and ice in winter
Schedule a Professional Tune-Up
While many of these checks can be performed by homeowners, a professional tune-up goes deeper — measuring combustion efficiency, testing electrical components, and identifying problems before they become failures. Call {PHONE} to schedule.
Need Professional HVAC Help?
Chicago Service HVAC's NATE-certified technicians are ready to help. Same-day appointments available.
Call (773) 231-8486