Hello everyone, my car is a 307 1.6 HDI, a 2006 model. When I turn on the air conditioner or heater, it only gives off gases to the windows and the feet, but very little to the grilles on the dashboard. When I give off gases only to the grilles, the same thing happens to the windows and the feet, but not to the grille. Has anyone experienced this before? Can you suggest a solution?