Boiler Diverter Valve

cwhaley

cwhaley

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When I use the hot water on my Main Combi Eco 25, all the radiators heat up. The longer the request for hot water is there, the hotter they get.

The boiler isn't old (late 2012). It was fitted very well by someone local considered very experienced (43 years) in what they do and is a very tidy install. It is downstairs and is plumbed into 6 radiators in total.

After a bit of Google-ing, I gather it is probably the diverter valve causing the issue. Some sites say it can be done by a local handyman (?) others say it's a gas-safe competent person only job. I have identified the valve housing and it is very accessible below the boiler.

Does anybody know what servicing these valves is like? More importantly, is it a job I could tackle as a (fairly competent) DIY'er?
 
If your priority is to save money,get the bloke down the st to take your boiler to bits.Competent diy er is such a vague,pointless term.Who has been servicing the boiler since 2012?
 
nothing to stop you doing it yourself, but its inside the boiler not below the boiler, make sure you cover the drop down panel with a towel or plastic bag as you dont want water getting into the electronics
 
durhamplumber said:
If your priority is to save money,get the bloke down the st to take your boiler to bits.Competent diy er is such a vague,pointless term.Who has been servicing the boiler since 2012?
Click to expand...

The priority is to save money during a period of having little of it, yes.

Yes it's a vague term, but my first post was just to gauge some opinion and get the discussion started. Certainly not pointless though. You can ask questions.

I don't know who has been servicing it since it was put in (bought the house in 2016). It was serviced in January 2017 and again this year but the problem has only manifested in recent months.
 
ianmcd said:
nothing to stop you doing it yourself, but its inside the boiler not below the boiler, make sure you cover the drop down panel with a towel or plastic bag as you dont want water getting into the electronics
Click to expand...

Thanks that's helpful - at least I know for now it's not just a competent persons job (still doesn't mean Ill do it). By below the boiler I meant below the combustion box - sorry. I have seen others where the pumps and valves are in different places which look harder to reach.
 
on your boiler it is usually the tail piece that is passing and water has got into the actuator motor , very simple job to remove the motor its just a clip, remove it and have a look and see if it has been damaged by water, if it has you need to replace the motor and the valve tail piece
 
Thank you - that's clear advice. Sounds fairly straightforward to check and determine whether or not I will do the job myself. I'll have a look at the motor tomorrow evening to see if there is any evidence of water damage and if so proceed from there.

Out of interest, would a failure in this part result in poorer performance when heating water?
 
You could turn off one or both of the heating isolation valves as a temporary fix while you get it repaired.
 
Read the instructions when installing new valve or you'll be doing it again very
soon ;)
 
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