we have a 2003 silverton 39my with a marineair vcp7k Passport II in our aft state room that only runs sometimes. it has been an issue with both heating and cooling. We will either turn the temputure up or down more then 3 degrees and you would hear a buzz, which i have been told is the reversing valve and then sometimes the compressor would start and sometimes it wont the fan comes on every time. I have had a tech over and he thinks the board is starting to go. When the light comes on the panel to say its running were not getting and voltage coming through the board but then sometimes after a while the compressor will start and sometimes it wont. If you leave the tempature set so it should start the unit after a few hours or sometimes by turning it off and on the compressor will then start. The tech said freon level and compressor are in good running shape. He couldnt come to a complete diagnoses.

Thanks Steve,
i had hoped it was the display/keypad was the problem, because i had picked up a replacement a few years ago. But unfortunately when i had the tech over he brought some from his truck and the issue still persisted. If you were going to fix it would you suggest the retrofit kit or would you just replace the board. Thank you