The FHA can make life miserable for the lender, including not insuring the loan, if the FHA determines that the appraisal does not meet there requirements. Thus, if the FHA tells the lender that the appraisal needs certain corrections and the lender asks the appraiser to make those corrections and the appraiser refuses to do so, many lenders are no longer going to use that appraiser. I have been involved in the lending business both on the origination side and as an appraiser for almost 25 years now, so I have a pretty good idea of how things work.
It is what it is. That is all I am saying