valiant called today and they have changed the pcb
but problem still not gone .
the engineneer told me that there is a live feed coming in to the pcb from one of the honeywell valve
if you take the wire out from number 3 on the pcb board the pump over run stops .
can a new...
hi mate i have a problem with my valiant thermocompact boiler i have screed under floor heating down stairs and floating floor under floor heating up stairs i also have a hot water storage tank up stairs in loft and the boiler is in the kitchen now i use to loose water pressure on my boiler so i...
frost/pipe stat?were is it on the boiler please as i have spent £200 beacuse some one said its the external wiering as the boiler was instaled in 2004 and was runing fine until they changed the expansion vessal due to loosing presure now its running when the timmer shoes its off i have changed...
hi i have a valiant thermocompact boiler with arinston presure hot water cylinder my boiler keeps on running when timer says its off and it fires up for 5 seconds and goes off i have pressed th i button and comes up with s7 code then s3 and s4 it is very confusing any help please icon_cry.gif
hi i have a valiant thermocompact boiler with arinston presure hot water cylinder my boiler keeps on running when timer says its off and it fires up for 5 seconds and goes off i have pressed th i button and comes up with s7 code then s3 and s4 it is very confusing any help please :cry: