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boiler going into lock out ?

potterton kingfisher cfl80 checked out overheat thermostat and chimney safety device TTB) any suggestions please boiler 5yrs old
jim, March 2010
hi Jimbo will try replacing PCB an d hope it will be ok thanks JIm

JIM, March 2010
I had the same problem on my potterton kingfisher 100 and it turned out to be the PCB unit. Replaced it and all is now fine.

Jimbo, March 2010
link Click here to see other fixes for Potterton Kingfisher.