Bypass valve

[Johntheo5]

The boiler casing would need removing I would think to check for a 3 way valve.

I have a feeling that some mix (or cock) up may occured in the configuring of your boiler and that the displayed flow temperature could or might be taken off a probe attached to the HEX or something like that, but what is really depressing is that any engineer or whatever they call themselves would say that its normal to have this huge difference in temperatures despite confirming it with his own gear.

 

[GeddyMortgage]

The boiler casing would need removing I would think to check for a 3 way valve.

I have a feeling that some mix (or cock) up may occured in the configuring of your boiler and that the displayed flow temperature could or might be taken off a probe attached to the HEX or something like that, but what is really depressing is that any engineer or whatever they call themselves would say that its normal to have this huge difference in temperatures despite confirming it with his own gear.

Then I’m right to feel like I was being palmed off. He was adamant the boiler was all perfect. But then ofcourse he would. It’s still under warranty for 6 years more.

I too suspect there’s a cockup. Are the diverters easy to remove If there is one there?

 

[Johntheo5]

Let WB worry about the (if) 3 way valve.

Write down or take a snapshot of these (especially temperature values).

 

[GeddyMortgage]

The boiler casing would need removing I would think to check for a 3 way valve.

I have a feeling that some mix (or cock) up may occured in the configuring of your boiler and that the displayed flow temperature could or might be taken off a probe attached to the HEX or something like that, but what is really depressing is that any engineer or whatever they call themselves would say that its normal to have this huge difference in temperatures despite confirming it with his own gear.

Had a look on the inside, do you see anything resembling a 3 way diverter in there? I didn't but im certainly not technical.

Also is the red capped thing at 18seconds some sort of blow off valve to prevent airlocking etc? If that was set incorrectly could that be causing the problem?

 

[GeddyMortgage]

Let WB worry about the (if) 3 way valve.

Write down or take a snapshot of these (especially temperature values).

View attachment 402397

I'll list out what it said below. Though first worth mentioning I set the A2 to 0 and it still did the jumping from 20 to 80% thing once it reached target temp on the boiler of 80'c. So i've turned it back off now. the below is the read outs all whilst there's no CH demand.

A1 - 203
A2 - 0
A3 - 100%
A4 - this wasn't in the menu
A5 - 45.8'c
A6 - 0
A7 - this wasnt in the menu
B3 - this wasnt in the menu
B5 - this wasnt in the menu
B7 - this wasnt in the menu
B8 - 0
C1 - 0.0
C2 - 0
C4 - 3 dotted line (not fitted)
C5 - this wasnt in the menu
C6 - 1.6bar
D1 - this wasnt in the menu
D2 - this wasnt in the menu
D3 - this wasnt in the menu
D4 - this wasnt in the menu
D5 - i have a setting for this on the boiler but its not in the manual anywhere.

 

[Johntheo5]

Ensure you don't remove any casing that might compromise the boiler casing gas sealing.
If you follow the boiler flow pipe back you might see where the flow temperature is attached, if so, take your own reading as close to this as possible and compare it with the displayed flow temperature.

I wouldn't run the boiler at that 80C just now. Suggest 70C. House should still heat up eventually.

 

[Johntheo5]

I'll list out what it said below. Though first worth mentioning I set the A2 to 0 and it still did the jumping from 20 to 80% thing once it reached target temp on the boiler of 80'c. So i've turned it back off now. the below is the read outs all whilst there's no CH demand.

A1 - 203
A2 - 0
A3 - 100%
A4 - this wasn't in the menu
A5 - 45.8'c
A6 - 0
A7 - this wasnt in the menu
B3 - this wasnt in the menu
B5 - this wasnt in the menu
B7 - this wasnt in the menu
B8 - 0
C1 - 0.0
C2 - 0
C4 - 3 dotted line (not fitted)
C5 - this wasnt in the menu
C6 - 1.6bar
D1 - this wasnt in the menu
D2 - this wasnt in the menu
D3 - this wasnt in the menu
D4 - this wasnt in the menu
D5 - i have a setting for this on the boiler but its not in the manual anywhere.

Can you follow the menu instructions in post 63 to see can you get those other readings.

 

[GeddyMortgage]

Can you follow the menu instructions in post 63 to see can you get those other readings.

Im not sure how to get the other ones to appear. Or do you mean run it again when the boiler is running / CH demanded?

 

[Johntheo5]

If you can't access those values then OK.
Were you able you located the position of the flow temperature sensor?