Thanks for the one answer and thank you mk378. I will replaced the expansion valve and dryer and see what happens.

After looking at my post I realized that I had left out important information and don't see a way to edit post.

When seeing the pressure swings the compressor clutch is not cycling.

Hi new to the forum. I am working on an a/c on my rv and have some questions. On pressures I am seeing a max of 30psi on the low with up to 250 on the high side 90 degrees oat. When starting up and turning the ac on it takes several minutes for pressure to start building. With pressure building I se...