Rail operator Northern said there may be delays of up to 30 minutes due to the fault, with disruption expected until 4.15pm.
Engineers are on site to rectify the fault.
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- Liverpool Lime Street heading to Blackpool North will terminate at Preston
- Blackpool North heading to Liverpool Lime Street will start at Preston
For live information, click HERE.
If you've been delayed by 15 minutes or more, hold on to your tickets and claim compensation by visiting www.northernrailway.co.uk/delayrepay.
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