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Is Your Router Why Your Wi-Fi Is Slow?

📅 27 June 2026 ⏱ 4 min read 🔧 PC Repair

Slow internet? Don't blame your provider just yet

You're sitting at home on the Costa Blanca, the sun is blazing outside, and your video call keeps freezing. Your first instinct is to ring Movistar or Vodafone and complain — but before you do, there's a very good chance the problem is sitting right there on your shelf, covered in dust, with a little row of blinking lights. Your router.

Routers are one of those things people buy once and forget about. But they wear out, they overheat, they run outdated software, and they struggle under the weight of a house full of devices. Here's how to find out whether yours is the reason your internet crawls.

Wi-Fi router with blinking status lights on a shelf

Step 1: Test your speed at the router first

Don't test Wi-Fi speed on your laptop from the sofa — that result includes every wall, appliance, and neighbour's microwave between you and the router. Instead, plug a laptop or desktop directly into the router with an ethernet cable and then run a speed test at fast.com or speedtest.net.

Compare the result to the speed you're paying for (it'll be on your bill or contract — in Spain typically 300 Mb/s, 600 Mb/s, or 1 Gb/s). If wired speed is fine but Wi-Fi is rubbish, the router's wireless side is the problem. If wired speed is also poor, the issue is either your router or your provider's line — keep reading.

Person running an internet speed test on a laptop

Step 2: Restart the router properly

Not a quick power cycle — a proper restart. Switch the router off at the wall, wait a full 60 seconds, then switch it back on. Wait two minutes for it to reconnect fully. You'd be amazed how often this clears the problem entirely. Routers accumulate small errors in memory over days or weeks; a real restart clears the slate.

If you haven't restarted yours in months, do this first before anything else.

Step 3: Check for overheating

Feel the top of your router. Is it uncomfortably hot? Routers need airflow. If yours is stuffed inside a cabinet, sitting flat on a modem, or surrounded by cables and clutter, it may be throttling its own performance to avoid burning out. Stand it upright, move it somewhere with open air around it, and keep it out of direct sunlight — especially important here on the Costa Blanca where indoor temperatures can soar in summer.

Step 4: Count your connected devices

Every phone, tablet, laptop, smart TV, doorbell camera, and smart speaker is using a slice of your router's processing power — even on standby. Log into your router's admin panel (the address is usually printed on the back of the router — often 192.168.1.1 or 192.168.0.1) and look at the connected devices list. A busy household can easily have 20+ devices. If your router is more than five years old, it simply wasn't designed for that load.

Step 5: Check the router's age and firmware

If your router came free with your broadband contract five or more years ago, it's probably due for retirement. Wi-Fi standards have moved on — routers that only support Wi-Fi 5 (802.11ac) or older will bottleneck a fast fibre line. Current routers support Wi-Fi 6 (802.11ax), which handles many devices simultaneously far better.

Also check whether your router has a firmware update available. Log into the admin panel and look for a "Firmware" or "Software Update" section. Manufacturers push updates that fix bugs and improve performance — most people never apply them.

When is it your provider, not your router?

If wired speed is consistently poor at all hours, especially if neighbours on the same street report the same thing, the fault likely lies with your provider's infrastructure. Ask your neighbours, run speed tests at different times of day (congestion is worst in evenings), and report the fault formally in writing to your provider. In Spain, OFCOM's equivalent is the CNMC, and providers are legally obliged to deliver contracted speeds.

When to bring it in

If you've worked through these steps and still can't pin down the problem, or if your router is dropping connections randomly, running very hot, or showing error lights you can't explain, it's worth having a technician take a look. At some points a device is simply telling you it's had enough — and a router is no different. We can test your line, your router, and your home network setup properly, and recommend the right replacement if one is needed — without pushing you towards anything unnecessary.

Technician setting up a new home Wi-Fi router

Quick checklist

Most slow Wi-Fi problems on the Costa Blanca come down to an overworked, overheated, or simply outdated router. The good news: once you know what's causing it, the fix is usually straightforward. And if it isn't, the same methodical approach works for diagnosing slow devices too.

FAQ

How do I know if my router is causing slow internet or if it's my provider?

Plug a laptop directly into the router with an ethernet cable and run a speed test. If wired speed matches what you're paying for, the router's Wi-Fi side is the issue. If wired speed is also low, the problem is your provider's line.

How often should I restart my router?

Once a week is a sensible habit for most households. Some routers let you schedule an automatic restart — check your admin panel. At minimum, restart it whenever speeds drop noticeably.

How old is too old for a Wi-Fi router?

Five years is a reasonable rule of thumb. Technology and household device counts have changed enormously in that time. A router from 2018 or earlier was designed for far fewer connected devices and slower speeds than most homes now need.

Can a router be repaired, or does it need replacing?

Most routers can't be economically repaired — the components are sealed and inexpensive to replace. A decent Wi-Fi 6 router costs €50–€120 and will likely transform your experience. A technician can confirm whether replacement is really needed before you spend anything.

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