We have a sixteen year old Potterton Lynx 2 combination boiler. During its life, it has had many new parts, it even arrived from new with the internal unions not very tight. The CH water pressure keeps dropping, I believe that is the pressure relief valve (I have tried to re-seat the valve many times), is it possible to dismantle the valve? The heat exchanger weeps and has nearly always done so, but it is getting worse. Sometimes it really stinks as it 'boils' the water additive. The heat exchanger is a tinned copper part, does this mean I might be able to solder up the leak ? A new part is around £625 to buy and fit myself.
I have been looking at replacing the whole boiler, but all the boilers I have looked at have different pipe connection locations than the current boiler's, and even worse, when I fitted this boiler, I had to move a rafter to fit the flue, and the new boilers have different positions for that too when compared to the existing flue.
So, opinions please: do I replace the boiler, or repair the current one ?
Thanks
David