B757 captain reported returning to departure airport after the aircraft failed to pressurize.

Attributes
ACN	1608810
Time
Date	201901
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	Climb
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

Received cabin altitude warning at 10;000 feet. Returned to [departure airport] and landed uneventfully overweight. Cabin auto 1 on MEL placard. Auto 2 failed to pressurize aircraft.

Original NASA ASRS Text

Title: B757 Captain reported returning to departure airport after the aircraft failed to pressurize.

Narrative: Received cabin altitude warning at 10;000 feet. Returned to [departure airport] and landed uneventfully overweight. Cabin auto 1 on MEL placard. Auto 2 failed to pressurize aircraft.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.