The knobs are good but the plastic inside the knob is what is broken. Can I not buy only the plastic part all 4 are damage.
The plastic inside the knob cannot be purchased separately. You would need to replace the knobs on the unit.
I have the knobs to the stove and they are in good condition. What I need is the stem that turns the knob on the bottom of the knob? Do I have to replace the whole knobs if I only need this part?
Answer Hello Pina, if the stem on the knob is broken, you will have to replace the whole knob. The manufacturer only provides them that way. Either the "Super Boost" knob EBZ37189609 or the other valve knob EBZ37189611. If you see the part you need in the knob picture, you need to order the whole knob. Hope this helps!