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Hi Tony, it turns out that the pcb was the problem all along - once the board was out you can see the burnt part (hidden under wires etc., when in situ) new board fitted everything now working fine. Thanks again for your help very much appreciated, thanks again

Hi Tony, engineer came today - we spent over an hour trying various tests - at first he said stat was faulty ! when stat removed & link in place boiler works perfect, remove link boiler continues to fire ? (presume it should stop) substituted known good thermistors - checked everything still...

Hi Tony, did a few tests today with clock re-pluged, it looks like the PCB might be faulty - I have got a BIASI engineer coming tomorrow, he recons it might not be faulty after speaking to him by phone, cant get new board till Monday (its the older twin board - it appears the boiler is 2003...

hi Tony, thanks for that - dosn`t surprise me, I get the feeling non of em seem too eager to help. I will go round tomorrow - re-plug the time clock - re-check everything and put another post then. Worth mentioning, had a salus RT500RF fitted prior BUT first one only had 2 boiler contacts NO +...

hi tony, failed to mention BIASI said to disconect boiler time clock so as not to confuse boiler with 2 timers

hi Tony, yes with the rf stat removed & link in place boiler fires fine ? boiler mounted in loft hence need for (preferably) rf thermostat, this is in my sons home but I have same honeywell rf unit with ideal boiler works perfect

Hi, help please, BIASI M90F.24S approx 7 year old, fitted honeywell CM921 rf thermostat - wired correctley - sender works with receiver but boiler fires at will - thermostat is working with receiver but will not fire boiler, spoke to both BIASI & HONEYWELL for the last week, they can not help -...

Hi any help please ? biasi M96 24SM/B has developed leak at base of actuator mounted on top of diverter valve, do I need complete service kit or just a diaphram ? have not looked yet as thought would get advice first, any help would be appeciated, also is a blown digram available anywhere for...