Why is my door entry system not working? The 6 most common faults in Valencia

Door entry system not working — where to start

When a door entry system stops working, the instinct is to call a technician straight away. But a quick initial check helps: in many cases the fault has a simple cause that you can describe clearly, helping the technician prepare and resolve it in one visit.

At Fermax Technical Service Valencia we have been repairing door entry systems across Valencia city and province for over 15 years. These are the 6 faults we see most often.

💡 Before you call: Check whether the problem affects only your flat or the whole building. If other residents also have no intercom, the most likely cause is a faulty power supply or external panel.

The 6 most common Fermax door entry system faults

Fault 1

External panel does not respond when button is pressed

Exposed to the weather, panels accumulate damage from rain, humidity and impacts. If no one in the building hears the bell, the problem is almost always here. Replacement is fast — usually resolved in one visit.

Fault 2

Internal handset does not ring or has no audio

If the panel works but your flat gets no sound, the fault is in the internal handset: speaker, microphone, buttons or cable connection.

Fault 3

Video without audio or audio without video

Indicates a fault in the audio module of the panel or monitor, or a poor connection in the wiring between them.

Fault 4

Power supply failure

When it fails, the intercom is completely dead throughout the entire building. More common in older installations or after electrical surges.

Fault 5

Deteriorated wiring or short circuit

Manifests as intermittent failures, line noise, loss of image or inability to open the door. Requires a specialist technician.

Fault 6

Electric lock or opening relay fault

The intercom works but the door does not open. The fault may be in the relay, the lock or the wiring between them.

When should I call a Fermax technician?

If the intercom has stopped working completely, faults are intermittent, or the problem affects several flats, the right course is to contact an authorised Fermax technician.

Technician tip: Take a photo of your intercom model before calling. You will find it on the label of the internal handset or on the external panel. With that information we can prepare the parts and resolve the fault in a single visit.

Completely dead intercom (no bell, no image, no door opening)
Intermittent faults that are hard to reproduce
Problem affecting the entire building
Noise or interference on the line
Door does not open when the button is pressed

Frequently asked questions about Fermax faults

How quickly can you come?

We aim to give an appointment the same day or the next. For emergencies, 24-hour response in Valencia city and throughout the province.

Is the quote free?

Yes, quotes are always free and with no obligation. We do not charge for the diagnostic visit if you accept the quote.

Do you use original Fermax parts?

Yes, we work with original Fermax parts to ensure compatibility and durability.

Does the repair come with a warranty?

All our work includes warranty. If a related problem arises, we return at no extra charge.

Need a Fermax technician in Valencia?

Free diagnosis, no-obligation quote and warranty on all repairs. Valencia city and all 266 municipalities in the province.

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The 6 most common faults in Fermax door entry systems in Valencia