Sulking Baxi Barcelona but no lock-out

17 Jan 2016
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United Kingdom

We have a Baxi Barcelona - yeah I know but this one has actually been fairly reliable believe it or not (in the past it has only really failed just after major household names have serviced it). But these past few days it has started to sulk. It runs, then shuts down with the power light on and will not come back on for ages. There is no lock out. Power cycling makes no difference.

The delay (the sulk) is long enough for the rads to cool completely. Yet some days it runs all day just fine.

Checking the fault chart, this is most likely the thermistor or the control PCB. I changed the thermistor as it did read 'low' according to the spec - no difference. So I changed the control PCB fully expecting a non-sulking boiler. No difference! I swapped back to the old board.

Yesterday it ran from 5am to 11pm no fault. Today, it seemed to start ok for a few hours, then shut down and sat unlit for an hour, then lit but very little output, then finally ramped up to full power.

I can't think of anything else in the blessed thing that can cause it...

Oh, and please recommend decent wall-mounted condensing boilers - this thing is 15 years old and maybe it's just fed up. Some companies now seem to offer long guarantees, no idea if they are actually any use though. Our experience of those major household name service contracts is they never keep any of the parts, so it usually takes a week to get the part.
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I don't understand why you think that you can fix it yourself.

Surely the answer is to call Baxi who made it and their engineers are more likely to bring parts with them.

But be aware that its an old and not very common boiler so they would probably only carry temperatures sensors and a PCB and perhaps the fan.

Or alternatively a competent independent who specialises in repairing boilers!


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