I have one of the above boilers which is now just over 3 years old. It
is set to 80% of maximum temperature and the H/W cylinder stat is at 65
It has started to intermittently trip to a fault state (red LED
Unfortunately the installing plumber can't visit until the New Year so I
was wondering if anyone can suggest investigation steps that I should
1) Join the ever increasing number of delighted Suprima owners
2) Search google for Suprima lockout
3) You probably have a faulty PCB
4) try CESLTD for a refurbished pcb or
5) Get signed up to British Gas boiler cover and hope it works the day
they inspect it and then 5a) call them in to replace it the next week
Hundreds of houses on our estate were fitted with these boilers, and
the engineer we know said he'd done about 40 PCBs.
Of course you could always try contacting Potterton about their
obvious design-flawed model, and good luck if you do!
Presumably in the US we would have organised some sort of class
action, got Potterton to replace every Suprima pcb in the country,
claimed $000's for mental anguish, and all met up for bagels in the
Oh and apologies for getting your website wrong Geoff - just to
clarify, removing and replacing the pcb is a simple job.
I had similar problems a couple of years ago at my previous house. The
boiler worked OK from cold for a few minutes. Once it had warmed up, it
would keep locking out when it was reset.
Following numerous searches on the internet and a posting on this newsgroup,
it seemed that the circuit boards in these boilers are very dodgy. Since the
boards were expensive to buy and I lived near the Baxi factory, it wasn't
much more expensive to get a Baxi engineer to come out on a fixed price
visit. £200 got me a new circuit board, a complete strip down and clean, a
test of voltages and pressures, 2 hours of labour and 12 months warranty. If
the circuit board hadn't fixed the problem, they would have come out and
replaced some more parts at no extra cost to me.
The engineer admitted that some batches of circuit boards were badly made.
The replacement board fixed my problem and I had no further problems.
The board looked easy to replace so you could probably do it yourself. The
question is, do you want to fork out for a new one in the new year or can
you live without heating for however long it takes Geoff to repair it?
Of course, it may not be the circuit board .... (always add a get-out clause
at the end of any posting just in case......)
Geoff can of course put his own case but I would say that you could
reasonably expect at least a return of post service IME.
In which case it would have to be the sensor (likely 30 quid)[not likely
if it went in only a few minutes] or the
overheat cut-out (cheaper), but the PCB is a known problem which defies
the rule "Try the cheap stuff first replace the PCB and gas valve last".
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at www.diyfaq.org.uk
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.