Why did my intercom stop ringing my phone all of a sudden?

If nothing changed on your phone, the building most likely edited the directory: staff turnover, a system migration, or a neighbor's update overwrote your entry. Carrier spam labeling can also start blocking the call after an update. Ask management whether the panel or directory was serviced recently, and re-check your phone's spam, Silence Unknown Callers, and Focus settings.

How can I test the intercom by myself?

Carry your phone down to the entrance panel and select your own unit. If your phone rings, the directory entry and your phone are both fine and the fault is the door-release step or the strike. If it does not ring, the number on file is wrong or your phone is blocking it. For a wall-handset intercom, have one person at the panel and listen for the chime inside; no chime points to a wiring or panel fault.

Who is responsible for fixing a broken intercom panel?

The panel, wiring, handsets, and door strike are building common areas, so repairs are the landlord's or HOA's responsibility, not a tenant cost. You are only responsible for your own phone settings and the number you asked them to program. Report hardware faults in writing so there is a record if the repair drags on.

Blog / Apartment Intercom Not Working? How to Diagnose and Fix It

Apartment Intercom Not Working? How to Diagnose and Fix It

By Ty · 2026-07-16

Someone is at the door, they selected your unit, and nothing happened. No ring, or a ring you missed, or a ring but the door will not open. A dead intercom feels like one broken thing, but which thing depends entirely on what kind of intercom you have, and fixing the wrong link wastes days.

Step 1: which intercom is this?

US buildings run two very different systems under the same word “intercom,” and they fail for different reasons:

A call-box or telephone-entry intercom dials your phone when a visitor selects your unit. Most of what goes wrong here is on the phone side and is free to fix yourself. This is the same setup Canadians troubleshoot as a buzzer that is not working.
A hardwired wall-handset intercom rings a box inside your apartment. There is no phone involved, so when it fails the fault is almost always the building’s wiring, handset, or panel.

Confirm which you have by selecting your own unit at the panel and noticing whether your cell rings or a wall unit chimes.

If it dials your phone, work down this list

Go from the things you control to the hardware the building owns.

The call goes straight to voicemail. Silent mode, Do Not Disturb, Focus, “Silence Unknown Callers,” and carrier spam filters all dump the intercom call to voicemail, because the panel dials from a number that is not in your contacts. Save the building’s calling number as a contact. This single setting causes more failed entries than every hardware fault combined.
The call connects but the door will not open. If you answer and the door stays locked, the release key may not be what you expect. Most panels open on 9, some on 6. Dial your own unit, answer, and try each key until the strike clicks.
The call rings then drops. A ring that cuts out before you can answer is usually a short panel timeout or weak signal where you are standing. Move to better reception during the window you expect someone, or set up something that answers instantly so timing stops mattering.
The number on file is wrong. If your phone never rings but a neighbor’s does, or the panel reaches an old tenant, the directory entry needs updating. Here is how to change the number your intercom dials.
The hardware has died. If the call never places at all, the fault is the building’s: a dead panel, cut or corroded wiring, or a stuck door strike. Report it in writing with the specific symptom.

If it is a wall handset, it is the building’s to fix

Handset intercoms have no phone settings for you to adjust, so a silent or dead unit means the wiring, the handset, or the entry panel has failed. There is nothing to troubleshoot on your end beyond confirming the unit has power and the buttons are not stuck. Report it to management in writing; the repair is theirs.

Where Lowkey helps

If your panel dials out and you are tired of catching every intercom call live, Lowkey answers for you. It is software with nothing to install on the wall and no camera to mount, so there is no new hardware to fail. It picks up the intercom call through your phone and opens the building’s front door so your visitor can come up, automatically with a 4-digit passcode on the keypad or a schedule you set in advance. A muted phone never strands someone in the lobby again.

You get push notifications when someone arrives, an activity history of every entry, and shared access for roommates or multiple phones, all on 99.99% uptime. The 14 Day Trial lets you confirm it works on your panel before you commit. (Lowkey works with intercoms that dial out to a phone number; a standalone wall handset that never places a call has to be repaired by the building.)