Potterton Promax 15/2 boiler not switching off

S

sd123

I have the Promox boiler. The boiler was not igniting so I changed the electrodes kit. The boiler fired and then stopped working again. I then replaced the PCB.

Now the boilder ignites but when the HW and CH is on together the boiler stays on without cutting out. (It was on for over an hour).

If I switch the CH off then the boilder starts cutting off and then switches on again like it should but the water does not heat up.

Any ideas anyone??
 
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Yes, call out a gas safe engineer. To change the electrodes you have breached the combustion chamber.....not a good idea unless your competant.
 

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