another 105 stuck closed post

so I have a machine that for the past 3 months it has a 105 stuck closed I have replaced all the normal components w/calibrations(also confirming at end of rinse) now its saying 105 stuck closed while patient is running but the machine is not alarming, still pulling uf, condo and temp are fine. just the "stuck closed banner"in red not alarming. I never ran across this before.