I am having a problem with my Lynx combi and would appreciate any help you can offer.
The boiler's GC No is 47.590.02.
I have followed the fault-finding flowcharts in the Installation and Servicing Instructions Manual but the problem doesnt quite fit any of them.
The boiler goes through the ignition sequence OK, lights up, goes to high flame and the temperature display lights show increasing temperature. As I understand it, before the display reaches the maximum, the boiler should change to low flame. The high flame goes out much too early though (usually when only two of the temperature lights are lit) and the low flame doesnt come on. The boiler then starts to cycle, making clicking noises, with lights flashing on briefly. Eventually it goes back through the ignition process, the high flame light comes back on for a short while then it goes out again and does the clicking and flashing again until I get fed up with it and switch the whole thing off. It shows the same problem on both Heating and Water. The problem seems to be temperature related as it works OK for a few minutes when starting from cold, it is when it gets hot that the problems start. It is therefore able to deliver a bit of hot water for washing etc but is useless for heating as it starts messing about way before it is getting any heat to the radiators.
I have had intermittent problems in the past which I eventually traced to bad joints on the PCBs, I have had them checked over recently and the joints resoldered so I dont think that is the problem. This problem arose briefly a week ago then went away, now it does it consistently. I have also replaced the fan recently as it packed up (not had much luck with the boiler all in all recently, getting a bit fed up with it). I suspect the modulator board but dont know how to be sure. Any ideas?
The boiler's GC No is 47.590.02.
I have followed the fault-finding flowcharts in the Installation and Servicing Instructions Manual but the problem doesnt quite fit any of them.
The boiler goes through the ignition sequence OK, lights up, goes to high flame and the temperature display lights show increasing temperature. As I understand it, before the display reaches the maximum, the boiler should change to low flame. The high flame goes out much too early though (usually when only two of the temperature lights are lit) and the low flame doesnt come on. The boiler then starts to cycle, making clicking noises, with lights flashing on briefly. Eventually it goes back through the ignition process, the high flame light comes back on for a short while then it goes out again and does the clicking and flashing again until I get fed up with it and switch the whole thing off. It shows the same problem on both Heating and Water. The problem seems to be temperature related as it works OK for a few minutes when starting from cold, it is when it gets hot that the problems start. It is therefore able to deliver a bit of hot water for washing etc but is useless for heating as it starts messing about way before it is getting any heat to the radiators.
I have had intermittent problems in the past which I eventually traced to bad joints on the PCBs, I have had them checked over recently and the joints resoldered so I dont think that is the problem. This problem arose briefly a week ago then went away, now it does it consistently. I have also replaced the fan recently as it packed up (not had much luck with the boiler all in all recently, getting a bit fed up with it). I suspect the modulator board but dont know how to be sure. Any ideas?