Recent content by Brian Johnson

I'm not buying second hand. A new unit, on EBay is £37.50 (free delivery)... Amazon £10 more .. other suppliers similar to or more expensive and not clear if there are delivery costs. It's my daughter's house - they understand the unit so think it makes sense to get another ...

Hi stem, Sorry it's taken so long to get back to you. I think I now have the problem understood. I think I have proven the problem to a faulty programmer. To get the heating to work (on CH only) needs both the white and the grey wires (on the V4073A 3 port valve) to be energized ... it's power...

First of all just changed the powerhead. No joy so then changed the whole thing. The boiler is an ancient back boiler ... not a Baxi, might be Glow Worm. Chances that we have two poor valves seems unlikely (?) so I'm going to check out the Orange and chase that through the wiring ... using the...

Thanks stem, great explanation and I'll check that out on Wednesday (my daughter's house). Do you think I can rule out a programmer fault?

Hi Folks, Sorry if this is a regular topic ... Y Plan with Honeywell V4073A valve and Towerchron QE2 programmer 03.04.00.0005.1 Hot water fine but no heating. When turning on heating, valve moves and light on pump glows for a second or two and then goes off. The white wire to the valve is...