Flight attendant reported gate agent opened main entry door despite given crossed arms sign and warn...

Narrative:

Coming into ZZZ. When we get to the gate; the pilot dinged and the seatbelt sign was turned off. I made the disarm PA. I disarm my doors when I noticed the jet bridge moving forward. I then get a call from [another flight attendant] at 2L/right. She tells me her pressure light is still flashing. I call the captain and he tells me to wait on opening doors. I asked if he wanted us to rearm. He said yes. I put the strap on my door and I made the PA to rearm doors. As I am making the PA; I hear the knock and I go down and give the X. As I am giving the X; the agent; who never even looked; just cracked the door open. I started screaming at him to stop. After about 4 minutes; the captain calls to tell me it is safe to open the doors. I made the PA to disarm doors and I did the all call. I then opened the 1L door and yelled at the agent. His only reply was that he saw a thumbs up. I told him that not only was I giving the X with both arms but that the little red banner was across the window. He shrugged and walked back up to the podium. After we deplaned; I walked out and I told him he better [report because I was. The pilots were still on the plane; and I believe they were writing up the flashing pressure light. I went straight to my [manager] and he advised me to fill out the report.

Original NASA ASRS Text

Title: Flight Attendant reported Gate Agent opened main entry door despite given crossed arms sign and warning strap across window because of a pressurization warning light illuminated at the doors.

Narrative: Coming into ZZZ. When we get to the gate; the pilot dinged and the seatbelt sign was turned off. I made the Disarm PA. I disarm my doors when I noticed the jet bridge moving forward. I then get a call from [another Flight Attendant] at 2L/R. She tells me her pressure light is still flashing. I call the Captain and he tells me to wait on opening doors. I asked if he wanted us to rearm. He said yes. I put the strap on my door and I made the PA to rearm doors. As I am making the PA; I hear the knock and I go down and give the X. As I am giving the X; the Agent; who never even looked; just cracked the door open. I started screaming at him to stop. After about 4 minutes; the Captain calls to tell me it is safe to open the doors. I made the PA to disarm doors and I did the all call. I then opened the 1L door and yelled at the agent. His only reply was that he saw a thumbs up. I told him that not only was I giving the X with both arms but that the little red banner was across the window. He shrugged and walked back up to the podium. After we deplaned; I walked out and I told him he better [report because I was. The pilots were still on the plane; and I believe they were writing up the flashing pressure light. I went straight to my [Manager] and he advised me to fill out the report.

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.

Attributes
ACN	1739832
Time
Date	202004
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	A321
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Pressurization Control System
Person 1
Function	Flight Attendant (On Duty)
Qualification	Flight Attendant Current
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Flight Deck / Cabin / Aircraft Event Other / Unknown

Flight attendant reported gate agent opened main entry door despite given crossed arms sign and warning strap across window because of a pressurization warning light illuminated at the doors.