I have a brand new GE Profile PVM 9125 microwave. From the first use it has made a clicking noise when you start any cook cycle. The noise only lasts for a second or so and then stops
A tech came out and said it was normal. I find that hard to believe.
Microwave Ovens - GE
Answers & Comments
Perhaps it is the sound of the underside of the oven platter becoming engaged with the drive spigot underneath it. If so it may well be normal for your particular oven.