Hello all, just purchased a 87 190E 2.6 in nice condition, 109K. Heat is always on, no vacum to monovalve on firewall. AC will work if Dehumidify button is engaged. Compressor will not come on if AC button engaged only. Electric AC Fan in front of condensor is not coming on when Dehumidify button is engaged so car heats up if sitting still or moving slowly in traffic. Is this all connected to the same problem? Any advise appreciated. Thanks Ken Evans