Posted By Jane Blunt Go and look at http://hps.org/hpspublic...icles/microwaveoven.html or http://www.fda.gov/cdrh/consumer/microwave.html, both readable accounts of the likelihood of the oven leaking. My microwave oven is well over 25 years old (but post 1970), weighs the proverbial ton, but I am confident that it is safe because no-one has ever dropped it or exploded anything in it. The door is in good shape and it still appears to be in good working order. But then again - I could be wrong! Jane

Posted By Frank Hallett Good evening Ray Assuming that this device is used in the workplace, then you should have a comprehensive maintenance and testing regime that doesn't just address the requirements of the Electricity at Work Regs but is extended to Food Safety and also regular testing for nicro-wave leakage. On older models, or high use newer ones, the seals that ensure that the micro-wave radiation stays inside can decay rather quickly and a visual inspection is simply not sufficient. Any good electrical contractor [or a visit to your favourite DIY store] should come up with a simple to use tester to check first the door and then the rest of the housing. Frank Hallett