Ariston MicroGenus 23 MFFI Hot Water query

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26 Apr 2017
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Hi all
I have the above system, I know (old and not the best) however it has served me well, considering it was already fitted in the property when I moved in.
Earlier this year I had the main and secondary heat exchangers replaced by British Gas (long story - they didn’t need changing but as they were BG they insisted, however back then the problem still persisted so I didn’t get charged for it; it was a faulty expansion vessel in the end!)
Anyhow I currently have a problem where the hot water downstairs or upstairs is tepid even when the dial is cranked up to max.
Heating works fine.
I have narrowed it down to the 3-way valve (can hear radiators ticking when water is drawn), however I have a query.
Do I need to drain the system down to remove it? This is so I have inhibiter at hand (added 2 bottles of Fernox F1 in October so will be gutted if I have to)
Also, does the lead on it come off easily? Do I just pull it off or is there a technique to it?
That’s it really.
Would appreciate the guidance as the lack of “hot” water is making for a quick bath at the moment
 
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check you cylinder stat first before you change the three port valve
 
check you cylinder stat first before you change the three port valve
Which one is this please?
Do you have a link so I can read into it?
It’s not the temperature probe is it?
 
It's a combi boiler. Given the questions, replacing a diverter is likely to be beyond you...call someone in.
 
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sorry read this post wrong when you said three way valve I thought you had a system boiler, my bad
 

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