Why does my potterton kingfisher mf100 keep going on to lockout. What is the problem? What can be done to cure this problem? I press the reset button and it works ok for some time then after a while it goes onto lockout again. Sometimes when the boiler stops it immediately tries to fire up again but does not ignite about 2 or 3 times then stops.

Jimbo, April 2008

Thank you Justin

I changed the control board as you suggested and it is now working properly. No lock out problem.

Thanks again.

Jimbo, June 2008

Change control board!

justin, April 2008