Ideal Logic Combi 24. It grunts!

[SonnySade]

Hi All,

I have a Ideal Logic Combi 24

Running Strong, I am getting 70% of the hot water and Central Heating is fine and strong, however after about 90 seconds the boiler makes a Grunting Sound which appears to be coming from the mid to top of the boiler, this goes on for about 10-50 seconds and then L3 flashes. We can reset the boiler but I don't want to keep doing that.

Quite strange, I had a look at the L3 in the manual and so did the engineer, it indicates that this is 'water flow' issue but we are still finding it hard to pin point the fault.

Engineer says it sounds like the burner and the Secondary heat Exchanger (The secondary Heat exchanger has been cleaned as water flows through it fine).

The Pump has been replaced, The Fan has been replaced also.

has anyone come across this before?


Thanking you in advanced for any pointers.

Sonny

 

[CBW]

Are sure it says water flow issue?

 

[SonnySade]

It flashes L3
The boiler has to be reset to clear it.

 

[jj4091]

Our Ideal logic 35 has on 2 occasions had to have the secondary heat exchanger replaced because of noise when running hot water. We did not get an error code & it sounded more like it had a jet engine inside rather than a grunting noise so it sounds like a different fault .But I thought I would let you know that the heat exchangers can cause noise problems

 

[algas]

Sump blocked ?