Volvo C30 2007 Service And Repair Manual page 528

Fig. 147: Identifying Flame Sensor And Pressure Equalizer
Courtesy of VOLVO CARS CORPORATION
Remove the flame sensor (1).
INSTALLATION
INSTALLING THE FLAME SENSOR
Install the flame sensor. Tighten. See TIGHTENING TORQUE .
Install the cable terminals and cables in the connectors. See:
- Flame sensor in positions 1 and 2 (blue and brown).
NOTE: Route the cables behind the fan motor to the connector.
Carefully push the fan housing into place.
Ensure:
that the connector is not trapped

that the cable seal on the water pump is correctly positioned and that the cable runs behind the fan motor
2012 Volvo C30 T-5
HVAC Climate Units - Removal, Replacement And Installation