I have a walk in box, Went to job yesterday found compressor flooding. Check to make sure evap was clean and fan going right way, all good. Tried to adjust expansion valve and nothing!! Went back today put in new valve and same thing, still flooding. Is it possible my new expansion valve is bad ??? It's an old R-12 system that has 414b in it now. It seems that refrigerant is just blowing by the valve, I cant even clear the sight glass, no matter how much refrigerant I put in. Am I missing anything?
High side pressure was about 112 and low side was about 38. Ambient temp about 64