Service on Metro-North’s New Haven line was back to full service today, Oct. 7. The railroad said a major new electrical substation at Mount Vernon was successfully tested over the weekend.

Customers who were affected by reduced service over the past several weeks may apply for credit on their monthly and weekly tickets.

The failure Sept. 25 of a 138,000-volt Con Edison feeder cable knocked out train service in an eight-mile section of the New Haven Line, the busiest passenger rail line in the country. The outage occurred during the construction and commissioning of the new, long-planned, $50 million substation installation that will enable the railroad to increase service on the line.

“As soon as Con Edison fixed the power failure, Metro-North was on the ground speedily restoring service,” said MTA Chairman and CEO Thomas F. Prendergast. “On behalf of the Metropolitan Transportation Authority, I want to thank our customers for their patience in the face of an unprecedented, 12-day service disruption. While authorities continue to investigate the cause of this failure, I want to thank the hundreds of people who worked tirelessly and safely to make needed repairs.”

During the outage, Metro-North ran limited service on the New Haven line with trains powered by diesel engines, and shuttled rail riders to stations on the Harlem line, which was unaffected by the outage.

Ticket credit

Customers holding weekly tickets valid during the period of Sept. 25 through Oct. 6 may begin applying for credit Wednesday, Oct. 9. They will need to bring their tickets to a ticket window.

Customers with monthly tickets for September and October may begin applying for credit Oct. 20, when November tickets go on sale.

The rail line is urging monthly customers who hold both a September and October ticket to apply for this credit for both tickets at the same time. Metro-North will honor New Haven Line November monthly tickets for travel beginning Oct. 20.

Mail & Ride customers will have this credit automatically applied to their December ticket. WebTicket customers should visit a ticket window in order to receive this credit.

Customers may apply for this credit until March 31, 2014.