VELOSTER(FS) >2013 > G 1.6 T-GDI > Heating,Ventilation, Air Conditioning > Heater > Temperature Control Actuator>Repair procedures  
Inspection
1.
Ignition "OFF"
2.
Disconnect the connector of temperature control actuator.
3.
Verify that the temperature control actuator operates to the hot position when connecting 12V to the terminal 4 and grounding terminal 3
Verify that the temperature control actuator operates to the cool position when connecting in the reverse.

1. -
2. -
3. Cool position
4. Hot position
 5. Sensor (+5V)
6. Feedback signal
7. Sensor ground

4.
Check the voltage between terminals 6 and 7.
Specification
Door position
 Voltage (6-7)
 Error detecting
Max. cooling
 0.45 ± 0.15V
 Low voltage : 0.1V or less
Max. heating
 4.55 ± 0.15V
 High voltage : 4.9V or more

It will feedback current position of actuator to controls.
5.
If the measured voltage is not specification, substitute with a known-good temperature control actuator and check for proper operation.
6.
If the problem is corrected, replace the temperature control actuator.
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the heater & blower unit.
(Refer to HA group - "Heater Unit")
3.
Remove the heater unit from the blower unit.
(Refer to HA group - "Heater Unit")
4.
Loosen the mounting screws and then remove the temperature control actuator (A).