Weird A/C problem

[Maikulz]

Recently I noticed that if I turn on the A/C whilst the car is moving I can feel something grind through the accel pedal. Has anyone else had this problem before as I m unsure where to start looking for this problem

[Lazarus]

+1 i like to know what's up with that...
I've noticed this as well, but also when you slowly brake you can feel the grinding feeling on the brake foot too

[Kay_lee]

Yeaa ! i have too, it gets really annoying