The biggest mistake people make with a WiFi extender is plugging it in right inside the room that has no signal. An extender can only pass on what it hears from the router, so a weak feed in means weak WiFi out. In Simon's Town, where homes climb the mountainside on several levels, that one error causes most of the complaints we hear.
Quick answer
Common WiFi extender mistakes are putting it in the dead room, hiding it in a cupboard, chaining one extender off another and expecting it to fix a slow fibre line. Place it halfway to the weak room, test your speed at the router first, and choose mesh or cable for split-level homes.
Placement mistakes with a WiFi extender
Where you plug it in decides almost everything. These three are the ones we fix most often.
Mistake 1: putting it where the WiFi is already dead
It feels logical to put the box where you need the signal. But if your phone shows one bar in that spot, the extender gets one bar too. Move it back towards the router until your phone shows at least two or three bars, then plug it in there.
Mistake 2: hiding it behind furniture
Extenders are not pretty, so people tuck them behind a couch, under a desk or inside a cabinet, and each of those cuts the range. Fish tanks, mirrors and metal shelving are just as bad. Use an open wall plug at about waist height or higher.
Mistake 3: ignoring thick heritage walls
Old stone walls along St George's Street and in older Castle Hill homes can be half a metre thick. A spot that looks halfway on a floor plan may sit behind the thickest wall, so test with your phone, not a tape measure. We see the same walls when doing TV mounting on heritage walls around Simon's Town.
Setup mistakes that slow everything down
Mistake 4: chaining one extender off another
When the first extender does not reach, people add a second one that connects to the first. Every hop eats into the speed, and the last room ends up with a weak, shaky link. If one wifi repeater is not enough, a mesh network or a cable is the better step.
Mistake 5: giving it a different name and forgetting about it
Many extenders create a second network called something like "Home_EXT". Phones cling to whichever one they joined first, even after you walk back to the router. If your extender allows it, use the same name and password as the router, or else teach the family which one to pick in which room.
Technician tip
Before you buy, run a speed test right beside the router. Then run one in the weak room. If the router itself is slow, no WiFi extender will help, and you need to speak to your fibre or internet provider first.
Expecting one WiFi extender to do too much
An extender is a fix for one weak room close to good signal. It is not a way to cover a three level house, a guest cottage across the garden or a whole guesthouse.
- Split-level homes in Murdock Valley and Glencairn often need a unit on each level.
- Outbuildings need cable or an outdoor link. Our guide on how to extend WiFi to a guest cottage covers the options.
- Busy homes with several people streaming and gaming will feel a small extender struggle in the evening.
- Slow fibre stays slow. The extender only spreads what the router gets.
This matters for TV too. If you connect an Explora to the internet through a weak extender, catch-up and app downloads will stall. A cable to the decoder is often the better fix.
Need DStv help in Simon's Town?
Tell us what you need or what your screen shows. We price the job before we drive out.
Security and upkeep mistakes
Extenders are small computers, and they need a little care like any other one.
- Change the default admin password on the extender's settings page.
- Use WPA2 or WPA3 security, the same as your router.
- Check the maker's app for firmware updates a few times a year.
- Keep it indoors. Salt air off False Bay corrodes plugs and contacts on anything left on a stoep or in an open garage.
Safety first
Plug-in extenders run straight off mains power. Never open one, and never use one on a damp outdoor plug. If you need WiFi outside or in a roof space, get a weatherproof unit fitted properly instead of climbing a ladder yourself.
Mistakes guesthouses and holiday flats make
Guesthouses and holiday flats near Boulders and the harbour have their own problem. Guests judge the stay on the WiFi, and one cheap extender in the passage rarely keeps every room happy.
Guests also use many devices at once, all evening, and a plug-in unit can drop out under that load. For B&Bs we usually suggest mesh WiFi or cabled access points with a separate guest network. Owners setting up DStv for guesthouses often plan the WiFi at the same time to save a second visit.
If you check the house from a distance, a steady link matters even more. Remote CCTV viewing only works when the cameras stay online.
Common WiFi extender mistakes and better choices
| The mistake | What happens | Do this instead |
|---|---|---|
| Plugged into the dead room | Weak signal in, weak signal out | Move it halfway to the router |
| Hidden in a cabinet | Range drops sharply | Open wall plug, waist height or higher |
| Two extenders in a chain | Speed falls with every hop | Mesh units or a cable |
| Bought for slow fibre | Still slow everywhere | Test at the router, call the provider |
| Default admin password | Easy for others to change settings | Set your own strong password |
Get your WiFi set up properly
If you have moved the extender, checked the router speed and still have weak rooms, a site visit saves you buying the wrong box. Our WiFi and network setup service covers homes, flats and guesthouses from Da Gama Park to Welcome Glen, and we test each room with you.
We are also your local team for DStv installation in Simon's Town. Call or WhatsApp 079 754 5527, or ask us for a quote and we will price it before we drive out.
WiFi extender: FAQs
What are the disadvantages of a WiFi extender?
A basic extender can cut your speed, creates a second network name on some models, and only helps one or two nearby rooms. It also cannot fix a slow internet line. For bigger or split-level homes, mesh units or cabled access points work better.
Can a WiFi extender cause problems with my router?
It should not harm the router, but a badly placed extender can make devices cling to a weak signal, so WiFi feels worse. Chaining extenders, or giving them the wrong password after a router change, also causes drop-outs.
Where is the best place to put a wifi repeater?
About halfway between the router and the weak room, in an open spot where your phone still shows two or three bars from the router. Avoid cupboards, the floor and spots behind thick walls, mirrors or fish tanks.
Is mesh WiFi better than an extender for a guesthouse?
Usually, yes. Guesthouses have many users and devices at once, often across several rooms or floors. Mesh units or cabled access points share the load better and keep one network name, which makes life easier for guests.
Do you set up WiFi extenders in Simon's Town?
Yes. We set up extenders, mesh systems and cabled access points in homes, flats and guesthouses around Simon's Town and the nearby areas. We test every room, explain what we found and quote before any work starts.