Hot water demand but big delay in flame kicking in.

Well, that would point to perhaps that the E model does have preheat and its just running on that? but if so then you'd think that it would have a set point temperature. If you just opened the hot tap just a trickle, not enough even to start the boiler normally and it does start up after a minute or two but then stops firing again, it might tell you something.

When it is running "normally" does the temperature change if you change the set point?
 
Johntheo5 said:
Can't assist you there I'm afraid but it does seem to be associated with the flow required to start the boiler since you said it kicks in faster with a high(er) flow.

What is this "don’t forget your 26.9 checks afterwards" from @CountryFan post #5?
Click to expand...
Certain boilers (unsure of this one) require gas safety checks afterwards part of regulation 26, paragraph 9.
 
Johntheo5 said:
Well, that would point to perhaps that the E model does have preheat and its just running on that? but if so then you'd think that it would have a set point temperature. If you just opened the hot tap just a trickle, not enough even to start the boiler normally and it does start up after a minute or two but then stops firing again, it might tell you something.

When it is running "normally" does the temperature change if you change the set point?
Click to expand...

Go to page 6 of my attachment, seems to say that this boiler does have warmstart

1763614171414.png
 
I’ve changed the hall sensor on the aqua flow block, and this has not rectified the issue, is there’s any other parts in this brass block that could be an issue and requires a change, as if got the whole unit.
 
Have you established if it has Warmstart and switched it off?.
Is there any indicating LED on the boiler display to show that DHW has been requested and if so, does it immuminate when a hot tap is opened?

Also when you do manage to get it running in DHW mode can you then change the temperature?
 
Johntheo5 said:
Have you established if it has Warmstart and switched it off?.
Is there any indicating LED on the boiler display to show that DHW has been requested and if so, does it immuminate when a hot tap is opened?

Also when you do manage to get it running in DHW mode can you then change the temperature?
Click to expand...
Sorry forgot to say yes i did do this and it’s still the same issue.
 
Okay i’ve witnessed the pin on the diverter valve pull up freely when central heating thermostat is called, and when you turn hot tap on eventually once it recognises demand it pushes down fine, any ideas?
 
Replaced whole aqua block as issue has been resolved. Does anyone know where to buy replacement flow restrictors for the mains inlet as other one broke and was stuck in the old fitting?
 

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.


Are you a trade or supplier? You can create your listing free at DIYnot Local

 
You must log in or register to reply here.

Similar threads

R
Vaillant turbomax 828 no hot water
Replies
8
Views
1K
Reidy828
R
L
Puma 80 combi boiler - water goes hot then cold
Replies
13
Views
3K
assured heating
A
A
glow worm 30ci i have heating but no hot water ?
Replies
0
Views
914
andynkel
A
compact
Combi Boiler not activated by Hot Tap
Replies
7
Views
1K
compact
compact
T
Baxi Combi Instant 105e: Hot Water only for high demand
Replies
3
Views
2K
TOMT
T
Back
Top