A321
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Situational Awareness; Troubleshooting
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Other / Unknown
Air Traffic Control Provided Assistance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Returned To Departure Airport
Aircraft; Procedure
While climbing through 18;000 ft.; we noticed the #1 engine had an amber 'XX' for the EGT (Exhaust Gas Temperature) display.No ECAM or status messages accompanied the failure of the EGT.The lack of ECAM messages for loss of EGT; along with no guidance in the QRH; led the FO (First Officer) and I to agree that continuing another 3 hours to ZZZ1 with no indication of the internal engine temperature was not the safest course of action. I contacted Dispatch and advised of our intention to return to ZZZ.We obtained ATC clearance to ZZZ. Flight attendants were briefed of the precautionary landing status; and an announcement was made for the customers assuring them of their safety. [Priority handling with] ATC was requested due to overweight landing. Uneventful overweight landing was accomplished on XXR. AML (Aircraft Maintenance Logbook) entries were made; Dispatch was notified; and Company and fatigue reports were filed.The FO was extremely helpful in accomplishing all tasks asked of him in a detail oriented; extremely efficient manner. Please thank him for his professionalism.[The cause was a] failure to fix repeat maintenance item;  [there is] lots of history on the engine.
During climb above 18;000 ft.; I noticed that the EGT (Exhaust Gas Temperature) indication for the left engine was displaying amber XXs. I notified the Captain of it and we proceeded to follow SOP and found no guidance in our manuals. After contacting Dispatch and Maintenance; we decided to return to ZZZ and request priority handling due to being overweight for landing. We landed without any further incident.[Regarding a cause; there is] nothing I can think of at this time except the issue with the EGT indicator.
Flight Crew reported a return to departure airport due to the loss of engine temperature indication on engine number 1.