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Recent content by QPRJohn

  1. Q

    Central heating not working

    Thanks for your help Mick.
  2. Q

    Central heating not working

    No feed to the white wire. It is fed momentarily when relay cuts in and then out. By linking a 240v feed directly to the white wire it operates the valve, so from that I assume it's the room stat or the relay module or both!
  3. Q

    Central heating not working

    My meter is DC, I'll borrow an AC Meter and get back to you.
  4. Q

    Central heating not working

    Ok will try this and get back to you. Thanks
  5. Q

    Central heating not working

    Yes, I have several meters.
  6. Q

    Central heating not working

    I'm trying to diagnose a problem with my friend's CH. It is a conventional gravity fed system, controlled with a Honeywell ST9400 programmer in conjunction with a HCW 80 room thermostat and HC60NG relay module. The hot water side of things works normally. I've performed the "teach in"...
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