| Inspect evaporator coil |
Lubricate fan motor |
Set manifold pressure |
| Check fan blades for tightness |
Measure gas input |
Test fan limit switch |
| Clean evaporator drain |
Check start and run delays |
Clean blower wheel |
| Adjust bypass dampers |
Monitor refrigerant level |
Inspect valves |
| Clean or replace filters |
Adjust operating pressures |
Check flue |
| Tighten electrical connections |
Measure voltage differences |
Check flame baffle |
| Clean condenser coil |
Evaluate vent system |
Test thermocouple |
| Measure temperature difference |
Clean and adjust burners |
Clean heat exchanger |
| Evaluate safety controls |
Measure amperage draw |
Clean combustion chamber |
| Adjust thermostat calibration |
Set burner adjustment |
Check combustion air |
| Monitor expansion valve |
Check start and run capacitors |
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