Line 6 Finch West shutdown resolved after power surge blows fuse, Metrolinx says
Posted January 12, 2026 8:10 am.
Last Updated January 12, 2026 3:02 pm.
Commuters faced hours‑long delays on Line 6 Finch West on Monday morning after a switch problem shut down the entire LRT line during the rush hour — an issue that has now been traced to an electrical power surge, according to the maintenance team responsible for the system.
The disruption began around 5:30 a.m., when the TTC announced there was no service between Finch West and Humber College stations. Shuttle buses were deployed across the full length of the three‑stop line, with 27 buses pressed into service as crowds built through the morning.
The line remained fully out of service until shortly after 8 a.m.
In an update provided after service was restored, Metrolinx said Mosaic, the maintenance contractor for Line 6, determined the problem originated with a sudden electrical surge.
“Mosaic maintenance team’s investigation determined that an electrical power surge caused a fuse to blow at one of the traction power substations (TPSS). The Mosaic maintenance team replaced the fuse, restoring full functionality and returning the switch to service at approximately 8:11 a.m.,” Metrolinx said.
Systems are now operating normally, and the company is continuing to assess the root cause of the surge.
Line 6, which opened in December 2025 after years of delays, has experienced several early‑morning disruptions since launch.
