worcester junior 28i combi boiler fault.

10 Dec 2011
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United Kingdom
Anybody any ideas?
We had our old potterton boiler replaced with a worcester junior 28i combi boiler about 5 years ago. Il be honest, not the best buy of the century!
Within 12 months Worcester/Bosch back to replace seal on pump,
within 24 months replaced dhw flow turbine, no hot water
after that, seal on pump went again,
various leaks and problems therafter.
Now, hot water ok but, when central heating on , burner lights for about 10 - 15 seconds and then goes off. The pump still runs but the rads are only lukewarm , even with the room stat up to max.
The fault indication light does not light and remains off.

The burner lights again ( as you would expect ) but goes off again (after 10 - 15 secs) without satisfying the room stat.
suggestions welcome.
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