A320 Pilot reported a Landing Gear Control Interface Unit fault with landing gear disagree and no nose wheel steering ECAMs after Maintenance cleared repair. Pilot reported a safe landing after working through QRH procedures.

Narrative

The aircraft with the same cockpit and cabin crew was scheduled for ZZZ2 to ZZZ1 and then as ZZZ1 to ZZZ. During [the initial] flight an ECAM for landing gear LGCIU (Landing Gear Control Interface Unit) 1 fault had to be managed by the crew in accordance with QRH procedures. Upon landing in ZZZ1 that fault was addressed by Maintenance Control and cleared in the logbook. Note: the same LGCIU had been previously written up days prior and cleared with a reset. This time a new part was installed though. On the second flight all indications were normal until the beginning of the approach into ZZZ. After landing gear extension we received multiple ECAM messages for landing gear doors open; gear unsafe with a 'unlock' indication. Crew performed a go around to troubleshoot the issue. An additional ECAM for no nose wheel steering was received after the go around. ZZZ Tower was advised of the reason for the discontinued approach and go around and informed of the potential for no nose wheel steering after landing which would necessitate a tow vehicle and temporary closure of the (only) Runway in ZZZ. Flight crew was given the brief items. Cockpit crew worked through QRH procedures and was able to clear the no nose-wheel issue. It was determined that after the second gear extension the only ECAM left was a L/G (Landing Gear) System disagree which points to a discrepancy between the two LGCIUs but had no further consequences on gear extension or steering for a safe landing. On short final all gear indications returned to correct indications and the aircraft landed normally and taxied to the gate. After landing ECAM messages returned and were debriefed with Maintenance Control.