Absolutely!
An FHA appraiser is not a home inspector. Yes, he or she will be conducting an on site viewing of the home and will note anything about the home that does not meet FHA guidelines however they are not as thorough as a home inspector.
Think of them as an appraiser with a check list - nothing more.

A home inspector will do things that an FHA inspector won't, such as in this photo showing John Seeley of WIN home inspection viewing the roof of the home to check for any flaws, damage, and estimated life span of the roof.

Yesterday I had an opportunity to sit down for a long chat with Mike Caira of Great Lakes Mortgage Funding in Sterling Heights and I asked him to fill me in on local issues that home buyers are having with FHA purchases.
One of his top concerns for home buyers that want to purchase a bank owned home was having the utilities turned on to the home, and the home being de-winterized prior to the FHA appraiser viewing the home to do his/her job.
If you have a full home inspection it is always wise to have the utilities on and the plumbing of the home in working condition.
Once your home inspection is completed and you let your mortgage representative and your buyers agent know that you are happy and ready to proceed the FHA appraiser will come out to do their job. The utilities will still be working in the home (if you had them turned on for your private home inspection) and the FHA appraiser will be able to do their job thoroughly without any glitches.
Keep in mind that if you don't have the electricity, water and gas turned on in the home prior to the appraisers visit and they have to make a 2nd trip that it will cost you more money.
Protect yourself.
Get a thorough home inspection by someone hired by you and working in your best interests. Have all utilities turned on and the home de-winterized. You will be happy that you did this, and your appraisal on the FHA home will go smoothly and save you any re-visit fees.
~Kris Wales~ A Macomb County MI real estate agent
More first time home buyer articles can be read at ChatAboutMacomb.com
Kris, Just inspected one of these houses yesterday. I do believe that the buyer was glad he invested the money...
~~ Your friend in Brentwood, TN - Michael