GLOW_WORM SAVERF whistling noise from boiler.

[shopmatrix]

Our GLOW-WORM SAVER F boiler makes a whislting noise like that
of a kettle when set to a high setting (above 3).
The noise has steadily been getting bad over the last
year. I have set it to 2.5 and the noise is now bearable. It whisltes just
before it turns off. I understand that the scalling in the boiler is causing
gas to be made which causes the whistling.
Some one told me that adding Fernox would solve the problem.
1. Would adding Fernox in it solve the problem?
2. Or would I need to buy a new boiler?
3. Would the Fernox later need to be flushed out or can it be left inside for
good. If left inside could the scale removed block the radiators?
4. I have heard that an inhibitor should be added. Is Fernox also a inhibitor?
or are these two different types of Fernox products?

Hope some one can help.

 

[ChrisR]

Try "Boiler descaler " or "Boiler silencer" Both can be left in.

 

[shopmatrix]

ChrisR: Thanks for the reply. Two more questions sprung to mind.

1.Could adding without flushing cause problems with the removed
scale/sludge effecting/blocking the radiators or the pump?

2. My system currently contains 100 (since August 1999).
Can I safely add the descaler/silencer to the system as it stands or do
I first need to flush out the Sentinel 100 before adding. Somebody told
me that it was safe mix Fernox with Sentinel 100. What do you thinks?

T.I.A.

 

[ChrisR]

Don't know of any such problems, though cases would not be well understood if they did happen. X200 is the Sentinel boiler descaler. Not the same as a desludger!

 

[shopmatrix]

ChrisR: Thanks for your help.