Thanks everyone for your replies. I have had a reply from Heartland,and they will repair it under warranty. I am in Apache Junction at present.I went to a dealer in Mesa,he suggested it was probably water related. He didn't seem overly interested in helping me.I will wait until I get home,and go to the dealer who sold it to me. Heartland don't think it is water related,I tend to agree,as I don't see any evidence of water.