How to repair a crack on a glass cooktop - Jenn-Air 30 in.JGD8430ADS Gas Cooktop

SOURCE: broken glass cook top

The top can not be repaired. The glass must be replaced . DO NOT USE IT CRACKED!!!!!!!!!!!! This is very dangerous as it can explode from the temperature. Also this is a severe electrical danger as glass top units have exposed elements underneath. Any liquid at all can short it out and cause a fire. I don't know if it is worth repairing. I don't have the exact price for your cooktop but last one I priced was between $350 - $500.

SOURCE: How to repair cracked corner of black ceramic cooktop

Epoxy would not work. If it is a very small chip and is NOT STRUCTURAL or in the heated are you could TRY the adhesive used for rear view mirror to glass attachment.

SOURCE: Kitchenaid 36" glass cooktop with small crack

I have the same problem with the Kenmore Elite cooktop 4428. The unit has cracked twice in the same spot while cooking, in a little over a year. I've also received 5 other defective units when Sears tried to replace the cracked units. I requested they replace with a gas unit but Sears refused. They just want to keep replacing the glass top($800) instead of fixing the issue!