Taurus V6-183 3.0L VIN U FI (1993)
Cold Engine Lock Out Switch: Description and Operation
COLD ENGINE LOCK OUT SWITCH (CELO)
The Cold Engine Lock Out Switch (CELO) has the function to prevent blower operation when heating is required and the engine coolant temperature is
below 120° F. When the coolant temperature exceeds 120° F, the CELO switch opens, turning the blower on when heating is required. The CELO will
not prevent blower operation when cooling or defrost is required.