Summary

On the digital clock versions of these ovens you have 6 of these buttons, if you break or lose one this should do the trick.

Under instructions I have some tips on getting a good result on this small part

Instructions

As it is a very small part you will need to either print more than 1 to allow the layer to cool or in my case using slic3r under the Printer Settings ==> Extruder 1 I have
Retraction
--Length 2
--Lift Z 5 mm
--Speed 30 mm
--Minimum travel after retraction 2 mm

This causes the Extruder to lift and drop between layers giving enough time to cool the layer.

I'm also running a large fan :)

Depending on your final result you might need to sand the end a little to reduce its radius so it doesn't stick when you push it in.

Fisher and Paykel stove button