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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...

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...