hi guys not sure if this post is in the correct area for starters but all it is ihave been asked to look at some fridge units well they are bottle coolers now ihave worked on fridges before but not alot and just looking for some more info really, do i just check the pressure etc to see if it running correctly but also the fridges ihave worked on never have stubbs on now i take it this is because you shouldnt really be touching the system is that right? again the ones ihave worked on ihave had to put thos screw stubbs on but find them not the best is that the only way really of geting into the system or are the other things out ther? basically ijust want to know things to check is it just like when i go to an ac unit etc thanks alot.

adam