Most boilers should be serviced once a year, whatever make you have or whatever fuel it runs on. Gas, oil and LPG boilers all follow the same rule: an annual boiler service from a registered engineer keeps them safe, efficient and under warranty. It’s one of those jobs that’s easy to put off, but it’s the cheapest way to avoid a breakdown when you need heating most, whether you’re in Henley-on-Thames or out in Nettlebed.

Why does a boiler need servicing every year?
A boiler is running gas, oil or LPG through a sealed system, so an annual check isn’t just about performance for a compact combi in a Marlow terrace or a larger system boiler in a bigger home. It’s a safety check first.
During a service, our engineers check for:
- Signs of wear, corrosion or leaks
- Correct pressure and flow
- Safe operation of flues and ventilation
- Efficiency losses that push your bills up
- Any fault that could void your manufacturer’s warranty
Most manufacturer warranties, including Worcester Bosch’s, are conditional on annual servicing by a registered engineer. Skip a year and you can lose that cover without realising it.
Does it matter if I have a gas, oil or LPG boiler?
No, all three need servicing every year, though what the engineer checks differs slightly:
- Gas boilers are checked for safe combustion, correct pressure and flue safety by a Gas Safe registered engineer.
- Oil boilers need the burner, nozzle and flue checked, plus the oil supply and tank, by an OFTEC registered engineer.
- LPG boilers are checked in a similar way to gas boilers, with extra attention to the tank or cylinder storage.
If you’re in a mains gas area like Henley town, Marlow, Sonning, Wargrave or Cookham, you’re most likely servicing a combi or system boiler. If you’re further out, in Shiplake, the rural edges of Henley and Wargrave, or off the gas grid entirely in Nettlebed, you’re more likely relying on an oil or LPG system, where annual servicing matters just as much, if not more, given the extra equipment involved.
What happens during a boiler service?
A typical boiler service visit takes around 30 to 45 minutes and follows the same broad steps regardless of fuel type:
- Visual check of the boiler, pipework and flue
- Check of the case, seals and safety devices
- Combustion or burner analysis
- Pressure and system check
- Test run and final safety check
Your engineer should talk you through anything found and explain it clearly, rather than just handing you a certificate.
How do I know if my boiler needs a service?
Book one every year regardless of how it’s running. Boilers can develop faults gradually, and by the time a homeowner in Wargrave or anywhere else notices a problem, it may already be a repair rather than a routine check. That said, get it looked at sooner if you notice:
- Unusual noises like banging or whistling
- A pilot light or flame that keeps going out
- Rising energy bills with no change in use
- Longer to heat up, or inconsistent heat
Is a boiler service worth it?
Yes. A service is far cheaper than an emergency repair, and in a rural spot like Shiplake or Nettlebed it’s the difference between catching a small issue in summer and waiting days for a callout on the coldest night of the year. It also protects your manufacturer’s warranty and your family’s safety.
Book your boiler service
If you’re looking for a boiler service in Henley-on-Thames, Marlow, Sonning, Wargrave, Shiplake, Cookham, Nettlebed or the surrounding areas, please contact us for further details. If the cost of a new boiler comes up during your service, we also offer finance options to spread the cost. Our engineers are Gas Safe and OFTEC registered and fully qualified to carry out any boiler servicing project.