Worcester 24i Combi Boiler constantly resetting

[truant]

OK - I have measured the flowrate and it is very close to 6 litres a minute of hot water (though a mixer valve).

The gas meter has a little red dial that goes around when the boiler is on.

Once again - thanks for taking the time to help me out.

 

[glasgowgas]

partial blockage on plate hex............................imho

 

[holty]

pretty much doubt that.

 

[bengasman]

partial blockage on plate hex............................imho

What plate hex? mk1 24 i

 

[bengasman]

Sounds like you have a block/restriction somewhere, and the boiler is not modulating down.
Turn the hot water on full, NOT trough a mixer, wait a minute to stabelise, and time carefully how long it takes for the dial to round exactly once.

 

[glasgowgas]

partial blockage on plate hex............................imho

What plate hex? mk1 24 i

apologies

 

[truant]

Right - sorry about the delay.

Tried it with the only non-mixer hot tap in the flat.

The red dial takes 50 seconds to go around once.

The flow rate remains around 6 litres a minute.

Hope this gives some clues?

 

[bengasman]

Your boiler is using about 22 kw, which should be enough to heat up around 10 l/min. As you are only getting 6 l/min through, the boiler will overheat if it does not modulate down.
this seems to indicate a control problem, most likely either the sensor, or the board.
Time to call out a RGI.

 

[holty]

under 20 kw net

 

[truant]

That's great! Thanks for all your help - its really appreciated. Now I just have to find an RGI...!

 

[bengasman]

That's great! Thanks for all your help - its really appreciated. Now I just have to find an RGI...!

The best way by far is to ask friends, colleagues, neighbours for somebody local they have used before, and keep using.

 

[Bish Bosh]

partial blockage on plate hex............................imho

I agree

 

[bengasman]

partial blockage on plate hex............................imho

I agree

I doubt that very, very much.

 

[Bish Bosh]

partial blockage on plate hex............................imho

I agree

I doubt that very, very much.

may be wrong but last two with those symptoms have been hex, to the original poster have you considered getting worcester out on a fixed price repair around £190ish but gaurenteed to to sort it.

 

[gaspro1981]

the boiler in question has a biflow heat exchanger and not a plate hex