Manxginge

Hi All I was wondering if somebody might be able to offer me some advice. We bought a Whirlpool AWO/R 4205 from B & Q in August 2009 when we purchased our new kitchen. Within two months the washing machine developed a fault. I contacted Whirlpool and they sent out an engineer who completely replaced the whole drum. 18 months later the washing machine is still working, but it's making a noise like there is a problem with the drum or bearings. Unfortunately I can't locate the original receipt. Do I have any rights with whirlpool? The machine was obviously faulty from the beginning and I feel reluctant to shell out to have it repaired when it's less than two years old and has already been repaired once. We don't nave an extended guarantee. Does anybody have any thoughts on this? I'm guessing whirlpool will have a record of the original repair from the serial number? What do you guys think? Cheers Andy