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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Central heating problem with Honeywell valve
Hi all,
I have a standard y-plan gas heating/hot water system. The hot water works fine, but for the last six months or so whenever I switch on the central heating it works for around ten seconds and then cuts out, with quite a loud "clunk" seemingly eminating from the Honeywell V4073a mid-position valve. After another ten seconds or so, the boiler reignites and the same thing happens again, and so on... I've discovered that if I slide the slider on the Honeywell valve to the "Open" position, then the heating works OK. But I noticed on the pdf data sheet for the valve (http://content.honeywell.com/uk/home...21%20V4073.pdf) that "Continuous operation of the valve motor at the fully Open position is not recommended". So my questions are these: 1. What is most likely to be causing the problem? 2. Is it safe/sensible to leave the valve in the Open position until this is fixed? I'd be hugely grateful for any help. Duncan Clark |
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