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
valiant compact boiler keeps running when timmer is off
- Thread starter ZIGGY786
- Start date
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the heating is fine hot water is fine cant understand what is is?
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 them timmer diverter valve and 2 honney well zone control valve also its had a new pump fitted by valiant as its under waranty 
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inside in the kitchen
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