Most poor TV signal problems are not the aerial’s fault, and don’t need a new one. Weather, a transmitter fault, mobile network interference, and a loose or bodged cable connection all produce the same symptoms as a failing aerial: pixelation, freezing, or channels dropping out entirely. Work through the free checks first, then the interference checks, then the cabling, before spending anything on a booster or a replacement aerial that might not fix it.
- Retune first, then check whether it's actually a known fault
- Weather and household appliances that mimic a broken aerial
- Is it 4G or 5G interference, not your equipment at all?
- Check the cabling before you blame the aerial or a booster
- Splitting one aerial to feed more than one TV
- Booster or new aerial: how to tell which one you actually need
- When satellite is the better answer than an aerial
- Not fussed about an aerial or a dish at all?
- When it's worth paying a professional
- Frequently asked questions
Retune first, then check whether it’s actually a known fault
A stale channel list and a live local fault cause more “no signal” calls than a broken aerial does, and both cost nothing to rule out.
If channels have vanished or a message about retuning has appeared on screen, Freeview’s retune guide covers the automatic and manual process for most makes of TV. That alone fixes a surprising number of “my TV’s broken” calls that are really just a channel list that hasn’t caught up with a transmitter change.
If retuning doesn’t help, the next free step is checking whether the problem is happening to everyone on your transmitter, not just you. RTIS, a diagnostic service the BBC runs for the benefit of all UK viewers and broadcasters, lets you enter your address and see live fault information for your local terrestrial TV and radio transmitters. Freeview’s own Channel Checker does something similar by postcode, showing current coverage and any ongoing issues or planned works in your area. Between the two, “is there a problem with TV signal in my area today” is a question with a real answer, not a guess.
One instruction worth following exactly: RTIS advises against retuning while a weather-related fault is still active. Retuning into a signal that’s currently being disrupted risks the TV locking onto a scrambled version of a channel, or dropping it, rather than finding the clean version. Wait for the fault to clear, then retune if it’s still needed.
Weather and household appliances that mimic a broken aerial
A fine, still, high-pressure afternoon can wreck Freeview reception as reliably as a storm does, according to Freeview’s own guidance, and it clears on its own.
Freeview attributes a specific list of everyday causes to reception problems that have nothing to do with the aerial itself:
- Household appliances, through power fluctuations at the mains: fridges, washing machines, tumble dryers, fluorescent lighting, lawnmowers, central heating systems and water pumps.
- Nearby devices, sitting too close to the TV or its cabling: mobiles, cordless phones and baby monitors.
- External sources: traffic, roadworks, and radios used by the police or taxis.
- Weather: high pressure, the same conditions associated with fine weather and morning fog, can affect reception. It’s temporary and resolves when the weather pattern changes.
The overlap between “good barbecue weather” and “bad Freeview weather” is a genuine one, not a coincidence dressed up for a headline. If reception was fine yesterday and isn’t today, and nothing in the house has changed, weather or a transmitter fault are worth ruling out before anything else.
Is it 4G or 5G interference, not your equipment at all?
If reception got worse after a nearby phone mast was upgraded, the fix is usually a free filter, not a new aerial.
Mobile broadband services can interfere with TV signals, and Restore TV, the scheme that succeeded the earlier at800 programme, exists specifically to sort this out for free. It runs an online diagnostic tool to check whether mobile network upgrades are the likely cause in your postcode, and where they are, supplies a filter that blocks the mobile signal from interfering with your equipment without you paying an installer to diagnose it. It’s at least one reception problem that genuinely isn’t your fault, or your aerial’s.
As with any scheme tied to network rollout, coverage of who’s affected shifts as operators upgrade more masts, so check Restore TV’s own site for current status in your area rather than treating this section as the final word.
Check the cabling before you blame the aerial or a booster
Connections cause more “I replaced the aerial and it didn’t help” complaints than the aerial itself does.
A digital signal needs to arrive at the TV above a minimum usable level, put at somewhere in the region of 45 to 50dBμV by both aerial-trade and technical references, below which pictures break up rather than simply looking worse. Every joint, splitter and metre of cable between the aerial and the TV eats into that margin before the signal even gets there. A cable joined in a standard electrical junction box, or twisted and taped rather than fitted with a proper screened connector, degrades the signal the same way a corroded outdoor joint does after a few winters of water ingress. Buying a new aerial to fix a bad connector further down the line is a textbook case of replacing the wrong part.
Splitting one aerial to feed more than one TV
A plain splitter is fine for two TVs off a decent signal. Add more TVs, or start from a weaker signal, and you need a distribution amplifier, not a bigger splitter.
Splitters don’t just divide the signal evenly, they lose some of it in the process, and a 4-way passive splitter typically costs around 8dB, more with a cheap or poorly made one. Whether that matters depends on how much signal there was to begin with:
| Setup | Typical loss | Usually fine on | Consider a distribution amp when |
|---|---|---|---|
| 2-way splitter | ~4dB | A strong signal, close to the transmitter | Signal was already borderline before splitting |
| 4-way splitter | ~8dB | A strong signal, feeding fewer than 4 rooms actively | Feeding 4 TVs, or on a mid-strength signal |
| Long cable runs (50–100m+) | Up to 20dB over 100m | Short, direct runs | A large or multi-storey property |
A mains-powered distribution amplifier typically adds around 6dB of gain, enough to cover a standard 4-way split without pushing the signal into overload. It sits between the aerial and the splitter, not after it, since amplifying a signal that’s already been split amplifies the loss along with everything else.
Booster or new aerial: how to tell which one you actually need
A booster can only restore signal that a cable run or a splitter lost. It cannot create signal that was never there, so if the picture is bad straight out of the aerial, a booster won’t fix it.
That distinction matters because it’s the opposite of what the boxes on the shelf imply. Signal above roughly 80dB can overload a TV’s tuner and cause the same pixelation as too little signal, so a booster fitted to an already-adequate signal can make things worse, not better, and one plugged into a genuinely weak signal amplifies the interference and noise sitting alongside it just as readily as the picture. Aerial-trade guidance is consistent on this: a booster earns its keep on cable-run loss and splitter loss, not on a fundamentally weak or obstructed signal at the aerial itself. A booster claiming to add “range” to an aerial that’s pointed at the wrong transmitter, or blocked by a hill, is solving a problem it can’t actually reach.
Widely stocked consumer boosters, One For All’s range among them, are worth comparing on that basis rather than by price or shelf position alone. Our guide to TV aerial signal boosters goes through the buying decision in detail, including how to tell a genuine cable-loss problem from a weak-signal problem before spending anything.
If the signal is weak everywhere in the house, not just at the TV furthest from the aerial, the aerial itself, its position, or its alignment to the wrong transmitter is the more likely cause. Our guide to choosing an outdoor TV aerial covers how transmitter distance and aerial gain decide what actually fixes that, including the loft-versus-roof difference that catches a lot of people out.
When satellite is the better answer than an aerial
Satellite reception doesn’t care about any of the above. No transmitter distance, no local mast upgrade, no household appliance interference.
For a property with genuinely poor terrestrial coverage, or one that already has a dish from a previous occupant, satellite is a separate reception path worth considering on its own terms rather than as a last resort. Our guide to setting up and aligning a satellite dish yourself covers what’s involved if you’re doing this without a professional installer.
Not fussed about an aerial or a dish at all?
If the appeal of fixing reception has worn off entirely, it’s worth asking whether you need broadcast TV reception at all. Our guide to watching TV without an aerial covers the streaming alternatives and the TV licence rules that still apply.
When it’s worth paying a professional
A fault-finding visit earns its cost once the free checks above have been ruled out and the signal is still weak across the whole property, not just one room.
Freeview’s own advice at this point is to bring in a qualified aerial installer rather than keep guessing, and it points specifically to the Confederation of Aerial Industries and Registered Digital Installers as ways to find one, rather than searching blind. Getting more than one quote is worth the extra ten minutes it takes, for the same reason it’s worth doing for any trade. Full installation and aerial pricing is covered in our outdoor aerial guide rather than repeated here, since the number depends heavily on whether the job is a loft aerial or a roof-mounted one with scaffolding involved.
Frequently asked questions
Is there a problem with TV signal in my area today?
Possibly. RTIS’s transmitter checker, run by the BBC, and Freeview’s Channel Checker both let you check your postcode against live fault and coverage information for terrestrial TV, which is worth doing before assuming the fault is in your own home.
Will a signal booster fix a weak or freezing picture?
It depends on where the loss is happening. A booster restores signal lost to cable runs or splitters, but it can’t create signal that was never there. If the picture is weak straight out of the aerial with no splitting involved, the aerial or its position is the more likely fix, not a booster.
Do I need a new aerial or just a booster?
If the problem shows up on every TV in the house at similar strength, suspect the aerial, its position, or its alignment. If it only shows up on TVs further down a split, or at the end of a long cable run, a distribution amplifier or booster is more likely to solve it.
How many TVs can I run off one aerial before I need an amplifier?
Two TVs off a strong signal usually work fine with a plain splitter. Beyond that, or starting from a weaker signal, a distribution amplifier (typically adding around 6dB of gain) keeps every TV above the minimum usable signal level.
Is bad weather really the cause of my reception dropping?
Yes, this is a genuine and well-documented cause, not an excuse. Freeview specifically names high pressure, the weather pattern associated with fine, still conditions and morning fog, as a cause of temporary reception problems that clear once the weather changes.
