No heating for the second time this holiday! Think it is down to the heating circuit motorised valve being faulty.

Now as I can manually open this valve (it’s a spring return type) anyone know how can I get it to fire up the pump too? I don’t think that manually opening it up completes the ‘start the pump up guv (and then the boiler)’ circuit?

Happy New (but cold) Year!

D

PS if anyone can confirm the colour code legend of these valves it could be helpful for me if I have to bypass the valve microswitch. I think on the heating valve (of a 2 valve system) the wires work out as -

BROWN (Roomstat temp dependent ‘no load’ LIVE)
GRN/YELL (EARTH)
BLUE (NEUTRAL)
GREY (CONSTANT 240v LIVE)
ORANGE (switched 240v LIVE to pump)

Brrrrrrrrrrrrrrrrrrrrr!!!!!

This helped a bit http://www.gasman.fsbusiness.co.uk/wiring.htm but lacks that essential wire colour coding info for the zone valves...

Connect the grey to the orange as a short term solution but you will have no room stat control, unless you wedge the valve open and connect the brown to the orange, make sure the power is turned off when doing this.

Mog

Jeez - that is another pint I owe you Mog! Must be well in double figures now - the baby still loves you!

I connected the brown to the orange with the valve manually open. Solution till tomorr...

Thanks!

D