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BEDNOBS, the reason I stopped using the oven was because of the loud piercing 'beeps' that kept coming from the useless timer. CATH, unfortunately it's several years old and not under guarantee. The shop it came from isn't in business any more. CHRIS, I'll have another look at that website. I tried to book an engineer, but the system wouldn't 'Send' the completed form. MISSPRIM makes a good point, but it looks as though I shall have to try phoning. Thank you all for your replies.