Boiler making a noise like an aeroplane taking off? Here’s why
If your boiler suddenly sounds like it’s preparing for take-off, it can be alarming. A boiler making a noise like an aeroplane isn’t just irritating – it can be a sign that something isn’t working as it should.
The good news? In many cases, the cause is common and fixable. In this guide, we’ll explain why your boiler is complaining, whether it’s dangerous and what to do next to keep your home safe and warm.
At a glance:
- A boiler making a noise like an aeroplane is often caused by fan issues, pressure problems or internal blockages
- Some noises are urgent and potentially dangerous, others are more of a warning sign
- Regular servicing can prevent most noisy boiler problems
- If the noise is loud, sudden or getting worse, it’s best to switch the boiler off and call in a professional
Why does my boiler sound like a plane taking off?
A boiler that sounds like an aeroplane taking off is usually producing a high-pitched, roaring or whooshing noise. This tends to happen when components are working harder than they should, or when airflow and pressure aren’t properly balanced.
Here are the most common causes.
1. Faulty or overworking fan
Modern boilers use a fan to push exhaust gases safely out of your home. If the fan becomes worn, unbalanced or blocked with debris, it can start to sound extremely loud.
Signs this could be the issue:
- The noise starts as soon as the boiler fires up
- Sound resembles a jet engine or strong wind
- Your boiler may struggle to ignite properly
This isn’t something you can fix yourself and should be checked by a Gas Safe engineer.
2. High boiler pressure
If your boiler pressure is too high, water is forced through the system at speed, creating a loud rushing or roaring noise.
Check your pressure gauge:
- Ideal pressure: 1–1.5 bar when cold
- Over 2.5 bar = potential problem
Need to fix your pressure? Here’s our guide to repressuring your boiler.
Bleeding radiators or repressurising incorrectly can cause issues, so if pressure keeps rising, professional help is needed.
3. Kettling (Limescale or sludge build-up)
Kettling happens when limescale or sludge builds up on the heat exchanger, restricting water flow. This causes water to overheat and boil, creating loud rumbling, banging or roaring noises.
This is more common if:
- You live in a hard water area
- Your boiler hasn’t been serviced regularly
- Your radiators take a long time to heat up
Left untreated, kettling can shorten your boiler’s lifespan, so it’s best to do something about it.
4. Pump problems
The pump moves hot water around your heating system. If it’s faulty, incorrectly set or struggling against blockages, it can create loud mechanical noises.
Possible symptoms:
- Noise increases when the heating is on
- Some radiators stay cold
- Boiler cycles on and off
5. Air trapped in the system
Air pockets can disrupt water flow, causing whistling, whooshing or vibrating sounds.
This is often accompanied by:
- Gurgling radiators
- Uneven heating
- Pressure fluctuations
Bleeding radiators may help, but persistent air issues suggest a deeper problem.
What should I do if my boiler is making loud noises?
- Note when the noise happens (on start-up, during heating, constantly)
- Check the pressure gauge
- Bleed radiators if you’re confident and it’s safe
- Do not open the boiler casing
- Book a professional inspection
If the noise is sudden, extreme or persistent, it’s best to arrange a boiler breakdown visit rather than wait.
When to worry about boiler noise?
When boiler noise can be dangerous:
- Loud roaring or vibrating sounds
- Smell of gas or burning
- Boiler switching itself off
- Carbon monoxide alarm sounding
If you notice any of these, turn the boiler off immediately and call an engineer.
While not every noisy boiler is dangerous, a boiler making a noise like an aeroplane should never be ignored, especially if it’s a new or worsening sound.
“Never use a gas appliance if you think it is not working properly… All gas consumers are advised to have appliances checked for safety at least every 12 months by a qualified engineer.” HSE Gas Safety Advice
Can a boiler service prevent noise problems?
An annual boiler service is one of the most effective ways to prevent boiler noise.
During a service, an engineer will:
- Check and clean internal components
- Test the fan and pump
- Identify early signs of kettling or wear
- Ensure safe operation and correct pressure
Learn more about our professional boiler servicing.
FAQs about boiler noise
Is a noisy boiler dangerous?
It can be. Loud or worsening noises should always be checked by a professional.
“Unusual noises can signal faults that should be investigated as part of safe operation.” HSE
Can I fix a noisy boiler myself?
You can safely check pressure and bleed radiators, but internal repairs must be done by a Gas Safe engineer.
Does boiler noise mean it’s about to break down?
Not always, but it’s often an early warning sign.
How do I diagnose boiler noises?
Start by listening closely to when the noise happens and what it sounds like. Whistling or kettling noises often point to limescale build-up, while roaring or aeroplane-like sounds can indicate fan or pressure issues. Banging or gurgling may be caused by trapped air or pump problems. Check your boiler pressure gauge and whether the noise occurs during heating, hot water use, or start-up.
If the sound is loud, sudden, persistent or getting worse, switch the boiler off and book a professional inspection to diagnose the issue safely and accurately.
Should I turn my boiler off if it’s making noise?
It can prevent further damage, but it’s not a fix. You should still book an inspection.
When Is It Time to Replace a Noisy Boiler?
If your boiler is over 10–15 years old, breaks down regularly, makes loud noises despite repairs, or is inefficient and costly to run…it may be more cost-effective to consider a new replacement boiler.
Final thoughts
A boiler making a strange noise like an aeroplane taking off is your system telling you something isn’t right. Whether it’s a simple pressure issue or a more serious mechanical fault, acting early can save you stress, money and cold nights.
If in doubt, don’t ignore it.
If your boiler is noisy, unreliable or overdue a check, our experienced engineers can help with servicing, repairs or replacement advice.
Book a boiler check today and keep your heating running safely and quietly.
Sources & further reading
- A guide for owners, managers and supervisors of boilers – hse.gov.uk
