An electrical fire at an MTA subway substation Sunday night near the 53rd Street station has thrown a wrench into post-Christmas transportation after it knocked out power along the third rail running along 7th Avenue.

The MTA says several subway lines are seeing major service changes Monday morning while repair crews get to work:

D trains are running on the A line between 59 St-Columbus Circle and West 4 St-Washington Square, then over the D line between Broadway-Lafayette St and Coney Island-Stillwell Av in both directions.

There is no service on the E line between World Trade Center and Queens Plaza in both directions, E trains are running on the R line between Queens Plaza and Whitehall St in both directions.

F trains are running on the R line between Jackson Heights-Roosevelt Av and 34 St Herald Square, then over the Q line between 34 St-Herald Square and DeKalb Av, then over the D line between Atlantic Av-Barclays Center and Coney Island-Stillwell Av in both directions.

Shuttle bus service is available between Queens Plaza and Roosevelt Island stations.

For Court Square-23 St, take 7 train service instead.

For Lexington Av-53 St and 5 Av-53 St, take E or F trains to Lexington Av-59 St and transfer to the 6 train to nearby 51 St station.

For Lexington Av-63 St, take E and F trains stopping at nearby Lexington Av-59 St.

For 57 St, 7 Av, 47-50 Sts-Rockefeller Center and 42 St-Bryant Park, take E trains stopping at nearby N line stations.

For 23 St and 14 St, take E trains stopping at nearby N line stations.

For Grand St station, take D trains stopping at nearby East Broadway F station.

As an alternative, for service between Queens and Manhattan, use 7 and N train service.

The MTA says to allow additional travel time. For more information, visit the MTA's website.