Most of the green Luas line will remain closed until Friday morning, as teams continue to try and fix damage caused by Storm Ali.
For the rest of Thursday, trams will only run between Brides Glen – Cowper and Dawson - Broombridge. There will be no service Cowper to Dawson.
Transdev said the damage done to the Luas overhead power lines by Storm Ali yesterday was "extensive".
An overhead wire in the Beechwood/Ranelagh area became entangled in a tram pantograph; there was significant pulling on the overhead wires, resulting in extensive damage.
A pantograph is a part of the roof of the tram which connects to the overhead line to collect power.
Over 200 metres of overhead line is being replaced and the tension is being reconfigured.
Affected customers can use valid tickets on Dublin Bus and GoAhead Bus Route 175
Customers who are using the bus service are advised to alight at Balally or Dundrum Stops for onward travel.