Intercom Not Working? 

It is a frustrating moment: a visitor presses the button and nothing happens, your handset stays silent, or the gate simply will not open. The reassuring truth is that "intercom not working" almost never means the whole system has died. In the overwhelming majority of cases a single component has failed - a surge-damaged power supply, a flat backup battery, a corroded wire, a worn handset, or a relay that has stopped switching. Each of those is an affordable, same-visit repair.

The trick is working out which part has failed before money is spent replacing the wrong thing. That is exactly what this guide is for. Below you will find a set of safe checks to run yourself, then a plain-English breakdown of every common fault - what you see, what is actually causing it, and how it gets fixed - so you can approach the repair knowing what to expect and what it should cost.

One regional note up front: because Gauteng sits high on the Highveld, summer lightning storms and power surges are a year-round threat to electronics. A large share of "my intercom suddenly died" calls trace straight back to a surge that took out the power supply or cooked a backup battery. Where that is the cause, fitting surge protection at the same time as the repair is what stops it happening again.

Eighteen years of gate-automation experience is what separates our work from a general electrician's: most intercom problems are really integration problems - the intercom talking to your gate motor - and that join is precisely what we understand best. If your unit rings but the gate won't open, that is our home ground.

These are all things you can safely do yourself in a few minutes. They resolve a surprising number of "not working" cases outright, and even when they do not, they tell the technician exactly where to look - which often means the right part arrives on the first visit.

The same words - "not working" - mean different things on different systems, and knowing your type narrows the fault to a handful of parts before anyone opens a cover.

The brand on your gate is a strong hint about the likely failure, even though the underlying causes - power, wiring, weather and surges - are shared across all of them. We carry parts and wiring diagrams for every brand below.

The five checks at the top of this page are safe for anyone. Beyond that, a few jobs are reasonable to attempt yourself, and several are not.

Fine to do yourself: topping up the SIM, resetting a tripped breaker once, cleaning a visibly dirty or stuck button, re-seating a handset on its cradle, and replacing the simple indoor batteries some units use.

Best left to a technician: anything that involves opening the gate-motor controller, testing or replacing the power supply, working on trigger wiring or relays, fault-finding a complex riser, or any work while the system is live. Intercoms are low-voltage, but they connect to mains-fed supplies and to your gate-motor electronics - and a wrong connection there can destroy an expensive control board. The moment a check would involve the motor's wiring, that is our cue, not yours.

There is also a simple economic logic to it: a call-out that finds and fixes the real fault in one visit almost always costs less than two or three rounds of replacing parts that were not the problem.

Match your symptom to the likely cause below. Most intercom faults in Gauteng are same-day fixes. Indicative repair prices include parts and labour; we confirm on site before any work begins.

This is the single most useful thing to establish, because it decides who you call and what gets fixed. Run through it in under a minute:

1. If the intercom lights up, rings, and carries clear audio, the intercom is fine - the fault is in the trigger circuit or the gate motor. 2. If your gate opens normally from its own remote, the motor is healthy and the problem sits in the wire between the intercom and the motor's trigger terminals. 3. If the gate will not open from the remote either, the issue is the motor or its power supply - not the intercom at all.

Because we are gate-automation specialists, we handle both ends. You are never bounced between an "intercom person" who cannot get the gate to open and a "gate person" who will not touch the intercom - the fault that lives at the join between the two is precisely the one we fix most often.

It is worth understanding why intercoms in Gauteng fail more often than the manufacturer's lifespan suggests - because the reasons also tell you how to prevent it. Three forces do most of the damage.

Lightning and power surges. The Highveld has one of the highest lightning-strike densities in the country. A nearby strike or a grid-switching surge sends a voltage spike down the mains and the gate line, and the intercom's power supply - the most exposed electronic part - takes the hit. This is the number-one cause of a unit that "worked yesterday and is dead today."

Power cuts and tired batteries. Repeated outages cycle the backup battery hard, and a battery that has been run flat dozens of times eventually fails to hold charge. A dying battery does not just stop providing backup - it can drag down an otherwise-healthy power supply, causing intermittent faults that are easy to misdiagnose.

Sun, dust and rain. The outdoor gate station bakes in summer sun, fills with dust, and takes direct rain. Over years this corrodes connectors, perishes seals and lets water into the unit - which is why the gate station almost always fails before the protected indoor handset.

The practical takeaway: the same surge protection and battery maintenance that fix the fault today are what stop you paying for the same repair next storm season.

Our approach is the same whether it is a single dead handset or a complex panel with units down: diagnose precisely, repair properly, and protect against a repeat.

Most "not working" faults are obvious once you know the patterns above. Two, though, are routinely misread - and chasing the wrong cause on either wastes time and money.

The intermittent fault - works sometimes, dies sometimes. An intercom that fails and then mysteriously comes back is the classic signature of a backup battery on its way out, a connector that expands and contracts with temperature, or a power supply that can no longer hold voltage under load. People often live with it for months, pressing the unit twice until it catches. The cause is almost always electrical and degrading - it will not fix itself, and it usually fails completely at the worst moment. We test the supply and battery under load to catch it before that happens.

It works for one person but not another. On a GSM intercom, if the gate calls one family member's phone but not another's, nothing is broken - the second number simply was not programmed in, has been knocked off the unit's list, or the unit has hit its stored-number limit. On a complex panel, one unit ringing and another not points to that specific unit's riser pair, not a panel-wide fault. Both are quick to put right once correctly identified, which is the whole point: the symptom tells you exactly how narrow the fault really is.