My wife put an empty mug in the mircowave. Soon the plastic cover on the top started melting and caught on fire ! She thought we would have to either buy a new one or have it fixed. No Way and No problem - This site that had the part and the assembly diagram. Under this cover there were no exposed internal parts and the defect didn't interfere with the fan, so we could still use it. Within a couple days I had the new part and installed it in less than 5 minutes. Thanks to this great web site - they had the exact part I needed.