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Rick Ridley
Rick Ridley, UK Heating Engineer
Category: UK Plumbing
Satisfied Customers: 2708
Experience:  30 Years on the tools, now retired, Ex CORGI
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my valliant boiler is displaying sf.h what does this mean

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my valliant boiler is displaying sf.h what does this mean
Hi I am Rick, UK Plumber, and I specialize on Boiler problems, can you give me the model of your boiler, sf.h is not a code I know, could you be miss reading it? Rick
Customer: replied 5 years ago.
the boiler model is eco tec plus 637 that code only came up when i held the plus and minus button togather.
its just that when i just put the hot water on no palot light comes on but it does as soon as i put the heating on
OK the problem will be with the diverter valve or the DHW flow switch or the primary NTC sensor could be faulty, if your DIY skills are up to it and you have a multimeter we can try and pinpoint it, but if you do not feel OK with this then you will need to call an engineer, Rick
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