That is great info. Thank you. The issue I just now is that as quickly as I clear the error, it comes back. I found another post where it was said that this is the ‘top solenoid’ sticking and needing a clean. So I removed and cleaned both solenoids which did not look dirty or appear sticky. It is massively frustrating. I rebuilt the compressor and it is very strong. But no use if it cannot get past this error.