Here's where my thoughts were coming from denman...
I can't find anything on the model listed, if it is an electric oven then it shouldn't even be tied into the GFI outlets in the kitchen it should be on its own dedicated circuit. If that circuit is GFI protected it would be a GFI breaker at the panel, can't say I've ever seen a 240VAC GFI plug. The OP specifically says "plugs", I take that to mean the GFI plugs on the wall the sink is on. That took me to guess this is a gas range we're dealing with.
If its a gas oven then it could be drawing enough current to trip a weak GFI which is a common problem with GFI outlets and breakers, not to mention what else is also plugged into the GFI circuit when its tripping, could already be at its threshold before the igniter even starts up. It doesn't need to be nor should it be on a GFI circuit. I've never heard of any local building codes that require the oven to be on a GFI circuit, but I suppose anything is possible, California often has even stranger laws.
If its a convection oven, gas or electric, it will have a motor in it.
Back to , plug it into a normal outlet and see if the breaker trips, if it still happens then clearly there is a short somewhere in the oven that needs to be located and fixed. If its been working and this just started happening when nothing else has changed I'd start by unplugging everything else controlled in this GFI circuit (don't forget to unplug the garbage disposal as well) and run the oven to see if the problem still happens.
If it does still happen you could either have a weak GFI breaker in the outlet with the little "push to test" button on it (most likely cause), or a short in the oven somewhere.
If it doesn't still happen then one of the other things you unplugged could actually be causing this and you only thought it was the oven doing it because the oven was most likely what you were directly using when its happened. Or again it could still be just a weak GFI outlet and putting other loads on this circuit is taking it out. |