Many thanks for your message. I'd forgotten I'd posted that, and haven't looked at the forum since. I've been helped by people posting solutions to various problems on internet before. Gives me a good feeling to know I've helped others 
PS I've had no further problems since posting that nearly 4 years ago. Dishwasher still working fine!
PS I've had no further problems since posting that nearly 4 years ago. Dishwasher still working fine!
