WB Greenstar Combi Boiler Fault 2965

[Johntheo5]

Anyone with experience/views on this?.

This, I believe, is a blocking code that trips the burner but when/if it resets. the burner will refire without any boiler reset.

If this fault code is up while in CH mode and there is a demand for HW, will the boiler still change over immediately to DHW mode (combi) and then refire the burner once this fault code clears.?

If the boiler is in DHW mode and this code is flagged does the burner just trip and then refire each time it clears?

What is the boiler flow temperature required to flag this 2965 fault code?.



Fault category B (blocking faults) (From boiler MIs)

Blocking faults result in the heating system being shut down temporarily.

The heating system restarts automatically as soon as the blocking fault is removed.

 

[Johntheo5]

WB inform that this (2965) is set to 88C, monitored with a sensor on the heat exchanger which presumably closely reflects the flow temperature.

So it would seem to be normal for this blocking to occur (if minimum boiler output greater than the minimum heating heating demand) if one wanted to (even though unlikely) run with the max flow temp of 82C with the default anticycle temp off of +6C or if running with a modest 73C flow temp and a anticycle temp off set to 15C