My 1986 300E AC unit will not blow cold. It's 90 degrees here and I need help. The systems is fully charged and the service tech checked for voltage getting to the compressor, found none. He then by passed everything and went directly from the battery to the unit and still the compressor would not fire up. Any advice?

Thanks in advance

Mick
I love my toys

86 300E
89 560SL
89 Bronco II