Functional Check

This simple 'first line check' will allow you to ascertain whether the system is operating within its design parameters, without recourse to PDU.

1. With the engine at normal running temperature.
2. Press AUTO to display selected temperature and illuminate AUTO and A/C state lamps.
3. Rotate FAN to increase or decrease lower speed, verify bar graph representation.
4. Select A/C to toggle on or off. (The compressor maybe inhibited by the ECM should either the engine temperature NOT be normal or the ambient be < 2°C).
5. Select RECIRC , state lamp should be lit and the recirculation flaps open.
6. Select distribution buttons in turn, verify correct air distribution and relevant state lamp.
7. Select DEFROST , check max fans and air to the windshield.
8. Cycle TEMPERATURE to ' HI' and ' LO ' to verify demanded variations and display operation. Note that extremes will provide max heat or cold independent of in-car temperature.
9. Select EXT to toggle between ambient and control temperatures.
10. Select F (where fitted) and R - noting exterior mirror; verify timer and operation (glass may be warm to the touch)
11. Initiate system 'Self Test' to display stored faults should any of the above not perform as stated.