When your climate control system flashes on and off three times at start up, it means that there is an error in the system. An error usually occurs when you have a faulty or disconnected sensor.
What you do is reset the system by doing the following:
1. Turn ON ignition only. (engine OFF)
2.Press the floor outlet button and hold while you press the Off button, then release both.
Your system should be resetting for about 20 seconds.
After 20 seconds, Your system will either go back to the off position or display an error code.( eg, E3,E5 etc)
If it displays an error code then you have a fault. I can give you a list of what these codes mean if you need it.
Also, do you live in Qld? Because I do and recently with all the hot weather we have been having, my system started to display a faulty temperature sensor. I have changed the sensor 3 times but it still shows a fault.