Have chevy 2007 HHR ,small engine-automatic-never have had any problems with a/c until after this winter.Last week turned on a/c on,blower on high-hot air! Open hood,compressor and clutch engaged.Noticed no cap on low side. I have no gages,so ordered Kit with dye and light,has single gage-hooked up on low side,gage readed full. So any Idea's? I've seen some mechanics with a manifold gage one for high and one for low side and readings give ideas what to do next. anything else I can uncover until the gages arrive??