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