Gas furnace maintenance
- Verify safe operation
- Test and clean the flame sensor
- Test the ignitor
- Test applicable capacitors
- Test the blower motor
- Install a new one-inch filter
- Test and adjust gas pressure
- Test combustion
- Inspect the heat exchanger
- Clean inside the blower cabinet
- Clean the drain line when applicable
- Clean pressure-switch hoses
- Check for gas leaks at the furnace


