A spokesman for the company said that engineers are currently on site working to resolve the issue.
Rail replacement buses are currently operating between Lancaster and Morecambe.
Disruption is expected to continue until at least 9.30am.
Northern trains cancelled between Lancaster and Morecambe
Trains are not running between Lancaster and Morecambe due to a signalling problem, says Northern Rail.
By The Newsroom
Tuesday, 21st November 2017, 6:37 am
Updated Tuesday, 12th December 2017, 11:18 am