i have never heard a bad thing about diva, they have the best quality i have ever seen and great service... just call them.

Make sure cooktop cooling air fan inlet and exhaust air outlet are not obstructed. When the fan runs full blast right after selecting and using a burner, is the exhaust air heating quickly (iffy), or hardly at all?

If everything except the fan speed seems normal, it is possible the controller has lost contact with a temperature sensor inside the cooktop and runs the fan on full speed as a precaution.

The customer service people should be able to nail it down.

I couldn't resist the bargain price I got online for my Diva De Provence DPP-5. I paid $2,300. The problem was a burner didn't work when I received it. I called Diva and they sent out a local appliance guy and he put in a new burner and finished up in less than 15 minutes. I have been using it for the last 6 months with zero problems. It has also been incredibly quiet, even when on high.

The best add-on to protect the surface are the SilPat silicone baking bads. They are much better than the round (and much thicker) Le Creuset silicone pads, which seem to prevent much of the induction power from reaching the cookware. It would be esthetically prettier if SilPat offered the silicone mats in circles--but I haven't found them online. But thery are still the cat's meow in protecting the surface of your induction cooktop and in keeping the cookware stable (and not sliding around).

The second best purchase I made for the induction cooktop are the Fissler (a premium German cookware manufacturer)Ultimate 4-piece fry pan set. It comes with two 11 inch fry pans--1 has a Steelex Protect premium non-stick surface, while the second 11 inch pan is called a Crispy Steelux premium fry pan (with engraved surface markings. It comes with the best splatter-proof cover have ever used (by a long way), that also fits onto the handles in an up position. It is perfect for preventing splatters on the cooktop. It also comes with a small plastic spatula for using on the non-stick pan (or even on the Crispy pan). The 4-piece set isn't cheap (MSRP $395), but can be found at the Fissler online store at $298. I use both of the fry pans a lot, so I consider them a bargain. I also consider the rest of the Fissler Pro-line and Intensa cookware to be great for induction (and even gas or electric too. I have given most of my All-Clad pots and pans to my sister, who has a Thermador gas rangetop.

Greg