I have a Bertazzoni gas cooktop with an internal gas leak, which might be an internal valve issue under the knob. We had it checked by a gas company, and the problem didn't come from the gas hose but in the unit. How much would that cost?

For your location, that would be for your technician to come out and check your cooktop. That will be waived if you proceed with the repairs with us. The technician will be able to give you an estimate after they inspect your unit. We have a technician available this Saturday from 10 AM to 1 PM. We can book that schedule for you, and you can cancel any time if you want. Our technicians are highly trained, licensed and certified for your Bertazzoni appliances.