Computers and Control Systems

AIR INTAKE HEATER CYCLE CHART

Intake Preheat Cycle Time Post-Heat Cycle
Manifold Ignition Key ON Ignition Key ON
Temperature Engine Not Running engine Running

Above 59°F (15°C) 0 seconds NO

18°F (-8°C) to 10 seconds YES
59°F (15°C)

1°F (-17°C) to 15 seconds YES
16°F (-9°C)

-15°F (-26°C) to 17.5 seconds YES
0°F (-18°C)

Below -15°F (-26°C) to 20 seconds YES