My New Welder arrived from R-Tech last week. Chuffed to say the east but concerned about the noise it makes. I was expecting a loud whirring as welders do but not this loud clicking sound. Its coming from the fan. Sounds to me like when a wire is bending inside a PC fan and hitting the blades. Or is this just normal and suppost to sound like this? I was gonna give R-Tech a ring but its Sunday and i would rather just get an opinion from yourselves before i make a fuss.