I found an e-guide being offered containing instructions on how to repair these PCBs with a set of Maplin parts costing under a fiver but cannot re-locate the site. Anyone know of it?

Terry Freeman, February 2008

http://kaijaks.co.uk/blog/nick/2008/02/10/dodgy-old-boiler

Dublin, November 2012

I have a Potterton Suprima 80. About 6 weeks ago I got the famous flashing red LED so did a bit of digging around on the net and then re-soldered most of the 'dodgy' looking joints on the PCB. This worked for a bit but then the LED started flashing again today, a mate advised changing the PCB together with the overheat thermostat and the temperature thermister. It's now been running all day and seems to be ok. All three cost £70 and the PCB was exchanged for a repaired one. Try Adlink on 0208 574 1978

Shahid Aziz, February 2009

There is a guide being offered on EBay.

Ashie, March 2008

I have just changed the PCB in suprima 40 but still tripping also changed ht lead. could it be the overheat sensor?

Scott Hood, March 2008