I generally work on the principle that if it's not broke you don't fix
it unless, like a car engine, for example, it clearly needs some TLC
like an oil change from time-to-time.
So how often does a boiler *need* to be serviced?
That doesn't answer the question though. Unfortunately the best one can say
in general is that "it depends".
If the boiler is in a position to get clean dust free air and is well
designed it can probably go years without service safely. As all new
boilers are room sealed you could probably argue that they could all be
left until the break down BUT our boiler had a faulty seal on the
combustion chamber that would have been replaced at a service (had we had
Despite it being (in my opinion) a "safety critical" fault, there was no
recall (or customer notification) as it was a part that would have been
replaced during a service.
So, unless you can get boiler specific advice, I think an occasional
service *before* a breakdown probably isn't a bad idea.
Not actually convinced regular servicing makes any difference to the
number of breakdowns. It might make more sense to wait for a breakdown and
have a 'service' then. But it makes sense for the owner to do regular
inspections to check for water leaks or anything obviously amiss, like a
change in performance.
*OK, who stopped payment on my reality check?
Dave Plowman email@example.com London SW
My flat is now about 8 years old
I would stake my annual salary that the previous occupant did not get the
boiler serviced during her 5 years of ownership (as a 20 something girly she
probably didn't know it needed doing)
and when I moved in, whilst it was on my list of things to do on the "it
aint broke so don't fix it" basis I kept on putting it off until last
When the guy came all he did was sick his measuring devices in the
appropriate places, fiddled with the controls for a bit, and after about an
hour declared it OK, filled in a form and gave me the top copy.
All he said was that the length of the run of the exhaust/air intake pipe
was a bit marginal. But as a flat there is no way that it could be changed
even if it were wrong.
Calling this a "service" is a gross exaggeration IMHO and the idea that it
needs to be performed annually ridiculous
My W-B is in its 3rd winter from new with no servicing.
I did have the cover off to make some wires for monitoring and noticed
that the condensate syphon did have some gritty looking crap in the
bottom so it there is some in there then there is possibly some in the
sump of the burner too so maybe that indicates I ought to service it
sometime next year perhaps?
Our WB hadn't been touched for nearly 4 years. Then it failed.
Turned out a seal had failed and fried the wiring harness. And a few
other things. The guy ended up replacing most of the innards, bar the wet
Luckily it was a prearranged fixed price repair...
My posts are my copyright and if @diy_forums or Home Owners' Hub
wish to copy them they can pay me £1 a message.
There is quite a lot of law on the servicing of cars to maintain a
warranty, does any of this extend to boilers?
There is also the Sales of Goods Act, and although there is a 6 year
time limit. Perhaps it could be argued that that the clock can start
any time in the 10 year warranty period. Bosch would have to provide
evidence the fault was caused by the lack of maintenance, or be apparent
in a service and hence avoidable, which IMHO would be unlikely.
Its another reason I don't buy things on the basis of their warranty.
Their small print is set to get you.
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