Hoover H634DB3TP/G3 Instruction Manual page 14

5. If the ferromagnetic part covers only partially the base of the pan, only the
ferromagnetic area will heat up, the rest of the base may not heat up a sufficient
temperature for cooking.
6. If the ferromagnetic area is not homogeneous, but presents others material such as
aluminum this may affect the heating up and the pan detection.
If the base of the pan is similar to the pictures below the pan could be not detected.
Cooking zone
1 & 2
3
The above may vary according to the size of the pan and the material it is made from.
The base diameter of induction cookware
Minimum
140
180
12
Maximum
180
290