Potterton prima 40F BIG BANG keeps cutting out after 1 min

21clues · 1 Nov 2009

Hi all,

I'm new to this site. I am really in a fix. I have a Potterton Prima 40F Bolier which has been working fine scince I bought my house 2 years ago. Yesterday in the middle of the night it made this really big bang noise. It sounded more like an explosion of some sort.

I got it working but it keeps cutting out after about a min and then comes on it self after about 2 mins. PLease help me i'm freezing.

I would really apreciate the advice.

THANK YOU!

mickyg · 1 Nov 2009

as a guess, pump failure, causing overheating(banging will occur) then overheat stat tripped.
Turn boiler stat off, check through hole in bottom casing. should be a red button. push it in. see if that makes the boiler work?

namsag · 1 Nov 2009

Or water leak around motorised valve and you have heard bang as it shorted out.
Is fuse in spur blown

21clues · 1 Nov 2009

Thanks. I tried this and it has worked however, the boiler keeps cutting out and goes off after about 1 minute or so. It won't stay on long enough to do anything. It is igniting.

Thanks again

mickyg · 1 Nov 2009

check pump

kevplumb · 1 Nov 2009

View media item 667
undo the screw marked bleed (have a cloth handy)

the shaft can be turned with a narrow screwdriver

if powered you should be able to see it spinning

bengasman · 1 Nov 2009

One more vote for the pump.
If it does turn, check that it also runs at setting 1.

21clues · 1 Nov 2009

I have 2 pumps which are both conected to the boiler mate tank. One is hot and other cold.

twgas · 1 Nov 2009

If it's too hot to touch turn the power off and let it cool, chances are it's the hot one that's packed up.

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Potterton prima 40F BIG BANG keeps cutting out after 1 min

namsag

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