A/C fan cutout

New Sunseeker with a Dometic 15K air conditioner. After running for about 5 minutes the fan cuts out for about 5 seconds but the compressor will stay running. It does this several times and then it acts normal. During this time the incoming voltage is probably marginal at about 110v. Have only been out once with it in hot weather so have not had a chance to characterize it further. Contacted Dometic and got a generic statement back that "when operating at anything other than 120v it may not act normal". Anyone else experience the same?