Three ComEd's new digital smart meters overheated and caused fires in customer's homes, the utility said Thursday.

ComEd said the problem in Chicago is not with the smart meters, but in the way they were connected to the customer's wiring.

"The cause was related to fitting and connection issues with an older-model socket that had a poor connection at the point where the customer's wires and ComEd's wires meet," ComEd said in a statement.

ComEd says they are taking additional measures to prevent this from happening again. Installers in the future will modify the connection sockets when needed. The utility said this will not increase its costs.

All ComEd customers are supposed to get the new meters over the next 10 years.

Source: Sun-Times/ Courtesy of Today Tonight