- Clean outdoor coil
- Oil outdoor motor
- Inspect electrical connections
- Check Freon level
- Check amperages
- Test all safety controls
- Blow out drain line
- Test/measure pressures
- Test/measure temperature
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- Check for cracks in exchanger
- Vacuum burners/exchanger
- Check vent pipe for leaks
- Check vent pipe connections at roof
- Test gas valve operation
- Test fan/limit operation
- Check thermocouple tip
- Set heat anticipator
- Test all safety controls
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- Check element operation
- Check high limit operation
- Check sequencer operation
- Set heat anticipator
- Check elements for damage
- Test all safety controls
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