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Honeywell V4073A mid position valve not moving: motor or PCB?
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<blockquote data-quote="Rob_the_rich" data-source="post: 455562" data-attributes="member: 8419"><p>I think it should be 45 degrees, only thing I can find on the web is this article <a href="http://www.lovekin.net/honeywell-motorised-valve-faults.html" target="_blank">http://www.lovekin.net/honeywell-motorised-valve-faults.html</a> which also mentions 70 degrees for a 2 port valve.</p><p></p><p>63V may well be correct, as an ac voltage is applied to keep the valve in the heating-only position, see <a href="http://www.diyfaq.org.uk/plumbing/controls/midpositionvalve.htm" target="_blank">http://www.diyfaq.org.uk/plumbing/controls/midpositionvalve.htm</a></p><p></p><p>Cant see any cpu in there, just a tranny, a couple of resistors and a couple of switches, although might be miniaturised.</p><p></p><p>So I would agree with Dave, valve mechanism getting stuck.</p></blockquote><p></p>
[QUOTE="Rob_the_rich, post: 455562, member: 8419"] I think it should be 45 degrees, only thing I can find on the web is this article [URL="http://www.lovekin.net/honeywell-motorised-valve-faults.html"]http://www.lovekin.net/honeywell-motorised-valve-faults.html[/URL] which also mentions 70 degrees for a 2 port valve. 63V may well be correct, as an ac voltage is applied to keep the valve in the heating-only position, see [URL="http://www.diyfaq.org.uk/plumbing/controls/midpositionvalve.htm"]http://www.diyfaq.org.uk/plumbing/controls/midpositionvalve.htm[/URL] Cant see any cpu in there, just a tranny, a couple of resistors and a couple of switches, although might be miniaturised. So I would agree with Dave, valve mechanism getting stuck. [/QUOTE]
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Honeywell V4073A mid position valve not moving: motor or PCB?
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