[Toreno]

Take this and enter your system / codes:

It checks if you pressed F and you are not in a car, then it works.

pawn Код:

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if(!IsPlayerInAnyVehicle(playerid) && newkeys & KEY_SECONDARY_ATTACK)
    {
        /* Your house system code should be here */
    }
    return 1;
}