Intercom repair or replace: a guide for Melbourne buildings

When an intercom starts failing, the first question is simple: can it be repaired, or is it time to replace it? Here is how we decide, and how to replace one without disrupting residents.

Start with the fault, not the age

An intercom is a system, not a single box. The fault could be in a handset, the entry panel, the power supply, the riser wiring, the door strike or the network. A building that is 20 years old may still have a perfectly serviceable system, while a newer one can fail because of water ingress or a cheap power supply.

Before anyone quotes a replacement, we test the parts that matter: power at the panel, continuity on the riser, handset operation, door release and call routing. That diagnosis is what separates a repair from an unnecessary upgrade.

When repair is the right call

• One apartment or one floor is affected. A single handset or panel fault is usually repairable.
• Parts are still available. Many established systems have serviceable handsets, panels and power supplies.
• The wiring is sound. If the riser and cabling test clean, a like-for-like repair can be the lowest-risk option.
• The building is not ready for a full upgrade. Repair can buy time while you plan a staged replacement.

When replacement makes more sense

• The system is end-of-life. If parts are discontinued, every fault becomes a scavenger hunt.
• Faults are spreading. Repeated failures across floors usually point to the backbone, not the handsets.
• Residents cannot verify visitors. No video, no app and no call logging is a security and service problem.
• You need mobile access. Older systems cannot support phone answering, temporary codes or delivery access.

The three replacement paths

Like-for-like replaces the failed parts on the existing wiring. It is the least disruptive and often the cheapest, but it does not add new capability.

Video entry adds a camera and screen so residents can see and speak to visitors. It is a common upgrade for older apartment buildings.

IP or mobile entry puts the intercom on the building network, with phone answering, app-based release, call logs and integration with access control. It needs a network and power plan, and a properly staged rollout.

Staging the work around residents

The biggest risk in an intercom replacement is not the hardware; it is resident disruption. We plan the rollout floor by floor or riser by riser, keep the old system running until the new one is commissioned, and agree access windows in advance.

We also confirm power, network, fire and door hardware requirements before work starts, and provide a simple resident notice template so building managers are not answering the same question twenty times.

What to prepare before you ask for quotes

• A unit-by-unit list of what is working and what is not.
• Photos of the entry panel, handsets and any riser cupboards.
• Building access rules and after-hours constraints.
• Whether mobile app entry is a must-have or a nice-to-have.
• A budget range and a preferred completion window.

If you send those to us, we can usually tell you within a site visit whether repair is realistic or replacement is the better spend.

WIS Security designs, installs and supports security systems across Melbourne. See our intercom and video entry service or request a free assessment.