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I had a Honeywell F4- 0019 motorised two port valve on my central heating that has failed. I have replaced it with a Honeywell valve from Thompsons Plumbase, but on fitting noticed the new valve has six wires instead of five, the extra wire being brown. How do I wire it in to get it to work which it doesn't if I ignore the brown wire. Thanks in hope Martin Fox

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I'm doing a lot of guessing here for lack of information. You have a residential boiler and hydronic heating system that is zoned around your home and each zone has an independent thermostat?
Again, I need to guess. The old valve was spring return with yellow, blue and red wires? If all is true so far, then I think you had a single end switch with one COMMON - one NORMALLY OPEN and one NORMALLY CLOSED contact. 6 wires would make up 2 end switches. Brown is a normal color for one lead of an end switch. If this is all true, your new switches are probably NORMALLY OPEN and you only need 1. If this did not help you, give me a better description of old and new and I will get this correctly answered for you.

Posted on Apr 01, 2011

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Posted on Jan 02, 2017

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