Have the car booked in at an air conditioning place on Wednesday and another one on the 14th Feb if he can't solve the problem. Is it possible it is a water valve issue? I tried the heater when I was out this morning and it was not too good either. Had the knurled knob on 3 red dots and the climate control on 26 degrees C on both sides and it was just warm. The temperature outside was about 22 degrees. On cooling there is still a distinct difference between the two sides of the car. I would say the RHS is blowing about the same as the temperature outside the car the LHS is cool but nothing terrific.