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Low Temperature Protection Control

When thermo control amp. detects that evaporator fin temperature is 1.5°C (35°F) or less, thermo control amp. switches A/C ON signal to OFF and stops the compressor.

Fig 1: Low Temperature Protection Control Graph
Courtesy of NISSAN NORTH AMERICA, INC.

When the evaporator fin temperature returns to 3°C (37°F) or more, the compressor is activated.