| • Check evaporator coil |
• Lubricate fan motor |
• Set manifold pressure |
| • Monitor expansion valve |
• Check start and run capacitors |
• 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 |
| • Evaluate safety controls |
• Measure amperage draw |
• Clean combustion chamber |
| • Measure temperature difference |
• Clean and adjust burners |
• Clean heat exchanger |
| • Clean condenser coil |
• Evaluate vent system |
• Test thermocouple |
| • Adjust thermostat calibration |
• Set burner adjustment |
• Check combustion air |
| • Check fan blades for tightness |
• Measure gas input |
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