- Check thermostat calibration
- Check furnace ignition assembly
- Check combustion air
- Test furnace starting capabilities
- Examine heat exchanger for defect
- Monitor flue draft
- Test furnace safety controls
- Inspect gas piping
- Check and clean air filters
- Check for correct air flow
- Check and tighten electrical connections
- Measure volts and amps
- Lubricate all moving parts as necessary
- Clean condensate drains
- Measure temperature difference between supply air and return air
- Check and adjust gas pressure
- Check and adjust pilot as necessary
- Clean and adjustment of blower components as necessary
- Examine equipment condition area, and clearances
- Check complete operation of furnace
- Clean flame sensor
- Vacuum furnace
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