Issue with T680 AC compressor.

I'll do my best to explain what is going on. I suck at trying to explain it by typing.
2014 T680 with an ISX
Truck has 1,022,253 miles
Since I've owned it I had 2 ac compressor put on. I've replaced everything from front to back on the system.
Last year it had a new AC line as it rubbed a hole known issue on the older t680s. Replaced unit charged back up to dealer specs which was like 3 lbs and 10 oz if I remember correctly.
Now last year it started pushing freon out of the relief valve on the AC compressor. Had it recharged last week and it's doing it again.

Here's the interesting part. If I over ride my fan it stops right away. I'm thinking maybe the high pressure switch is messing up? It came with a new line last year.
Looking for some advice here...

 

Fixed issue was the high pressure sensor.