Hi, Hope someone can help me out, i have a potterton suprema boiler and had a recon circuit board fitted in January, but 6 wks later it started locking out, it is ok once i re-set the re-set button but keeps on locking out up to 5 times a day now, i had same plumber back and he changed the heatsensors on the pipework, this seemed to work but two days later it started locking out again, i know there is a problem with these circuit boards but one thing that i noticed is that my hot water gets very hot, even with both thermostats on cylinder turned down to 60. Now the plumber has not returned my calls all week, but i have noticed a lot of blogs regarding these circuit boards or could it be a thermostat problem