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Just to update and thank everyone who helped me with some good advice. After ensuring the water feed etc was clear I replaced the pump this evening and everything is working properly. Thanks again for all your help

Fair enough !!! :) I'll try all the advice given over the last few posts (and thanks to all the posters).. In terms of the pump how can I test it (assuming the "spinning test" isn't giving me a definitive answer) ?

Ok... Tested the pump this morning and it seems to be spinning fine so I'm assuming the pump is ok

Yep...All pipes to and from the motorised valve are red hot

The motorised valve is a MPE332 (Myson Power Extra)... Just checking it out now for the code as I saw that 1) The CH light is on (Water is off) which should be correct as the water is hot whereas the heating is "required" 2) The lever for switching from auto etc is "flapping" about...

Thanks for this... What's the best way to check the cold feed and unblock it (assuming it's blocked)

Perhaps a stupid question but can I do this while the system is running or do you mean to power it down and manually check that the pump isn't seized

Just a last bump of this thread before I pay British Gas the £180 repair callout charge to sort it out... To Recap 1) Water is heating without a problem 2) The boiler doesn't seem to be firing the heating (Red Light Solidly on and Green Light flashing but boiler not firing in response to...

The boiler just fired up (for it's usual minute or so before switching itself off) but this time there was an unusual noise from the boiler... It wasn't really loud but it was noticeable. Best way to describe it was a bit like when you've got a noisy fan on your PC !!!!

:D Just been up in the loft and the header tank feels about 3/4 full so I'm assuming that's ok !!

I haven't checked it. How could I check it ?

Another update !!! :) The Green light is still flashing on the boiler but 2/3 of the upstairs radiators are "half warm"... None of the downstairs rads are getting any heat... It seems like the boilers is constantly "firing up" in response to the call for heat but then is shutting down...

Should have added that the pump is a Myson CP53

Thanks for the quick reply yep...I've got no problems in terms of hot water so I'm assuming the boiler is heating that ok.. I had the motorised valve replaced about 3 months ago so I'm assuming it's not that... Is there anyway to test the pump or what should I be looking out for ...

Hi I got a potterton suprima 40 system (about 10 years old). Haven't had the heating on for a while but when I tried to put it on it's not working.. Green light is flashing on the boiler (indicating a call for heat I'm assuming) The pilot light ignites the boiler which runs for approx...