Recent content by Ray T.

Hi, I have a 2007 freightliner M2. The a/c will not build pressure. I have replaced the condenser, rec/dryer, compressor, and both manifold lines from compressor. Also has new pressure switch for the fan. The compressor will run and has all the Freon in the system. Anyone have any solutions.

Are you trying to charge the A/C. Low side is the bigger line. Charge ports are on the passenger side under the hood by the frame.