I am a Peugeot 307 xt premium automatic transmission user and for about six months I noticed that my brakes are not holding when the air conditioner is on and backing up. I wanted to look inside the valve-shaped protrusion it was connected to, and when I looked, I realized that the hole is very small and the air passage is very limited. When I heated and pierced the thin screwdriver, the valve that provided air inlet into the manifold opened and when I assembled the car and tested the brake, I realized that my problem with the brakes was over. I wanted to share so that