Recent content by magick777

Well, I'm pleased to report that my repairs seem to have been successful in restoring both CH and DHW on-demand, for the first time in two or three years. The diverter valve diaphragm was ruptured, and a new one caused the pin on the valve to travel far enough to contact the microswitch, but...

I'm pleased to report that my air pressure issues are now fixed. With a new APS and the fan running correctly, all that remained was to clean the venturi, sealed up the combustion chamber and my central heating is all back to rights. :D Thank you for the explanation on the diverter valve...

Tony, with respect, and while I appreciate your concern... 1) I watched the valve fail over the course of a couple of years as it pushed the pin out first by 6mm, 5mm, 4mm, 3mm and slowly ceased to work as designed. Wouldn't surprise me if it has seized by now, and I'll cross that bridge if...

I have a further question about airflow and the air pressure switch. The new APS is in place and with the combustion chamber still open, everything works. The fan now fires up when CH is switched on, which it didn't before, and ignition happens after five to seven seconds. Until I put the...

I wouldn't regard a repair charge of even £100 plus parts as "too high", but I was quoted £270 and £350 just to replace the diverter valve, when the pin moved freely and it patently didn't need replacing, and before I ever had problems with the air pressure switch. This was some years back so I...

Thank you, gasguru, that's perfect. Sounds doable enough, parts ordered. :-) I shall be a very happy man if £36 in parts and a couple of hours of my time fixes central heating and restores DHW on demand...[/i]

Thank you; this is very helpful and it's good to hear someone say something other than "replace the boiler". Regarding the APS, I don't have a multimeter so I'm thinking it may be wise to swap the ten-year-old, £21 part speculatively rather than pay someone to test it. My thinking is that 3...

I have an ageing Ariston A23/MFFI that I can't really afford to keep alive, much less to replace. It has developed multiple faults over the course of 2-3 years that I've mostly learned to live with: 1) First the diverter valve diaphragm went. None of 6 plumbers I called would replace it, with...