Recent content by neilleeds

Ok thanks I'll try that. I think the system could do with a good clean, flush and inhibit (think the inhibitor could do with renewal and I have no idea what is in it). Bearing this in mind I might as well put in some X400 now and see if this helps with any of these symptoms. Then I have a...

Sorry if I'm not been clear, I appreciate your help. The noise is in the inlet of the rad which I guess (but don't know) is the one closest to the boiler on the circuit. The noise starts as soon as the boiler stops burning. There is also a (not especially loud) whistle noise from the boiler...

What is the best way to do that? I presume it is coming from the boiler and is caused by scale. Thanks

From what I read I believed that the kettling was boiling of the water which produced air bubbles. Are there any other obvious things it might be, since it seemed better with the pump turned up I guess that rules out air being drawn down vent. There is a fizz noise at one of the radiators when...

For anyone interested, it appears that the boiler has been kettling, causing the air. Turning the boiler stat down and pump up seems to have helped. I'm planning on putting some X400 in for around a month and then a good flush followed by X100 and maybe X200. Hopefully this will restore the...

Thanks, I tried to light it but it didn't seem to ignite. I assume the system is treated but I don't know what with so I can't top it up. I'm planning to do a drain-down and flush etc maybe in a few months and I will then put some X100 in (and put the sticker on the tank!). I might conduct the...

I have discovered that several of the lockshield valves downstairs appear to be leaking, I suppose this is the likely cause of the air? What is the best way to remedy this? Replacing them presumably means a drain down, I would prefer to do this when the weather is a bit warmer. Any temporary...

Thanks, There were deposits in the header tank which I carefully cleaned out recently, since then there has been no further deposits but could these point to the same problem? I will look for a blockage in the pipes (plastic). I put a cup of water up to the expansion pipe to see if it...

Hi, I am having a problem with air in my open-vented central heating system. I checked out the Honeywell mid-pos valve and it appeared to have been weeping so I guess it is this that is introducing air. Having tightened the nuts a bit it doesn't appear to be weeping now but it seems like air...

Hi, I have a conventional open system. Recently one of my radiators has been making a bubbling noise. This only seems to occur just after the boiler has shut off. What happens in the boiler shuts off (presumably because of its own stat) and the pump continues to run (presumably normal) and...

Thanks everyone for the help, I have purchased a Honeywell, fingers crossed the swap goes smoothly.

Bumping, any help much appreciated on how difficult it would be to swap a Siemens valve for a Honeywell. Thanks

Thanks, That's the impression I got but how easy will it to swap as far as the plumbing is concerned? Dimensions etc?

Thanks, I think I will go for a replacement Siemens one, as you say I will then know it's all good and the swap should be straightforward with it being a direct replacement. Neil

Hi, I hope someone can help me with a bit of advice on the following, done plenty of searching and have an idea but a bit extra clarification would be great. Situation: I have a Siemens MA-V322C mid-position valve. I replaced the synchron motor a while ago but now it is not working. I...