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The HT Lead disappears into what I assume is the gas chamber? I didn't want to disturb that as I'm not a pro where gas is concerned! I will try and remove as much I can I guess and take the soldering iron to it. Cheers for the advice. Matt.

Sorry to drag this up again... I started to remove all the leads but how does the HT lead come off - doesn't want to come off easily. There is a red crimped wire going onto a black pot on the board - which part comes off, or do I have to slide the crimp off - nothing wants to give. Also...

Many thanks to everyone so far. I will give it a shot once I work out how to remove the board. I know I'm stubborn and probably should just stump up the cash and get Potterton to put a new one in, but I think it's wrong spending money on something that's clearly a manufacturing problem...

How easy is it to remove the PCB? Can you do this without disturbing the Gas side as I don't want to disrupt that part! Is it just a case of heating up each solder joint one by one?!

Oh well it was worth a try!! I was told that perhaps the diverter valve was not reporting which position it had got into quickly enough and the boiler timed out - as I wasn't sure either way on this advice, I thought I'd ask here. It just seems strange that if we power-down the boilder...

I took the Actuator off - it's a sealed unit (with screws that I haven't a screwdriver for!) How easy should it be to turn the valve by hand? I can turn it it easily enough, but it's still got some resitance to it. Also... does it matter which position I leave the valve in when I re-fit the...

Thanks :D Do you think this could be causing the boiler to lock out though?

There are quite a few openings on the valve where I could squirt in WD40 - can I do this, or do I risk damaging it? Or would this be pointless? From the sound it make, it does sound stiff.

Thanks Mandate. Do you know if the Potterton 3-port has a seal between the motor and value part? I read somewhere yesterday that some of the Danfluss ones do not and you end up getting wet when replacing!! What is the name of the part I am looking for? I don't expect it to just be called...

I tried putting a digital thermo reader against the tank where the thermostat sits and it read 59.8, which is close enough. It did switch off once it got to 60 - although I could have just been lucky that time. I wondered if this fault was related to the main one I posted.

Hi, I've got a few problems with my central heating, so hoping someone can point me in the right direction. I have searched the forum to see if anyone has the same issues, and was shocked to see how crap Potterton is - so could be another case here. Our bolier (Suprima 30) locks out quite...