I just bought a new Frigidaire electric range. On top of stove burner the element does not turn completely red. Should the entire element turn red? Not just partially.
It might or might not be an issue, depending on what is actually happening and element type.
For "normal" coil elements, if one spot on the element gets red significantly earlier than the rest of the element, it's time to replace the element before it burns out and starts arcing.
A slightly uneven redness is not a problem. As such, pictures would be helpful.
I have to assume this is a glass top type. If so, it might be defective OR it might be a design feature. You'd have to check the specific model number to find out.
If this is an open element type, it would not work this way, as the entire burner is conducting current. I highly doubt this is the case, however.
This is not necessarily an issue. See the related question about oven heating element HERE