Baxi 105e hot water problem

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Hi guys. I have a baxi 105e and having issues with hot water. Seems to work fine when heating on. However when heating is off takes a lifetime for water to heat up. No fault lights flashing. Have already replaced the dhw diaphragm and thermistor. Considering replacing the whole diverter valve with new one (not a repair kit) looking for advice as to whether this will solve my problem.
Thanks
 
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Does the boiler fire up and illuminate the DHW demand light when heating off and you turn on a tap?

Do rads get hot when you run a hot tap for a while?

Tony
 
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Yes. Boiler fires up. Hot water light green burner light orange. To my knowledge the radiators dont get hot. However this morning i did notice the upstairs ones get hot. Yet heating timer was not active.
 
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Ran upstairs bathroom tap and checked radiators. They do heat up.
 
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So should i just buy a new diverter valve. Had repair kit for diaphragm and that came with diverter valve kit. Have read that these are not entirely reliable.
Also. This doesnt require the gas to be isolated. Just the water...correct?
 
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I have never replaced a complete diverter, what can go wrong with the brass housing? All the internal parts can be replaced, and if done with due dilligance, the repair is permanent.. On the other hand, if you're not confident then a complete valve is the way to go.
Only the water is turned off, together with the system depressurised..
 
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Fantastic. Thanks for your quick responses. Very much appreciated. Lets hope this fixes my issue.
 
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Plus, be aware that if the diverter is stuck, then you may also have some detritus in your plate HE!
 
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That will require a boiler engineer to sort out no doubt?
 
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Not if you can get to it without compromising any room seals and you're up to the task. But I did say 'might' so, just have that in mind if you change the diverter and still have issues with HW.
 
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Ok thanks. Will have a look at instructions and see how comfortable i feel doing it. If problem persists may have to call for a engineer
 
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I would just replace the whole assembly rather than messing around with diaphragms , for a 100% fix
 
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Page 37.
Plate Heat Exchanger is connected to the diverter valve so... Whilst you're at it, as they say!
 
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Aha. Mine is page 35. This would require isolation of the gas i take it.
 

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