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Potterton Promax 28 HE Boiler- No Gas

Postby eric2301 » Fri Oct 26, 2012 5:29 pm

Hi Everyone,

Potterton Promax HE 28KW Combi

We have a problem with our boiler it keep flashing E133 No Gas to the boiler, checked the gas and does have gas to the boiler.

I took the front cover off and removed the elecotrodes cleaned these and also isolated the gas supply to the boiler and switched the boiler on to check the igniton was working ok, which it was.

Someone has suggested we replace the gas valve.....

Anyone have any ideas of what it could possibly be ??????
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Postby htg engineer » Sun Nov 04, 2012 9:13 pm

Came across this accidentally, as you have posted in wrong section. The Electrode should be straight and you should be able to slide a £1 coin between them, anymore/less space and I would renew them. They changed the electrodes a few months after the Promax came out as there were problems with them mis-shaping - do you know if you have the new style? http://t1.gstatic.com/images?q=tbn:ANd9 ... uOlJCciAQ1

the old one's are like this : http://t3.gstatic.com/images?q=tbn:ANd9 ... fJLGLvqZ3A
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