Honeywell V4073A - Orange wire staying live?

[vicvapour]

Sorry to hijack but I have same problem with a new Worcester greenstar boiler, but with a Horstmann 3 Port valve. Heating comes on with heating set to off , but if I turn on Hot water for an hour it stops the boiler [unless stat on tank asks for hot water of course].I thought it might be the valve not returning after the heating is turned off but if like the Honeywell it's still producing a small voltage would the resistor work for me? My heating engineer suggested changing to Honeywell valve but would seem from everyone's postings that it is unlikely to help.

A new valve is unliklely to help, do as picasso suggested and add the resisitor to stop the stray voltages, that should help.

 

[foxhole]

Have fitted capacitor as specified in earlier post between orange[live] and blue [neutral] but boiler still runs without Heating on.

 

[foxhole]

Update, fuse blew after 1/2 of having heating on?
Can capacitor be wired the wrong way round?

 

[foxhole]

 

[rosiew]

Change the whole thing😓

 

[foxhole]

Change the whole thing😓

THING

 

[Dan Robinson]

Valve.

 

[picasso]

As far as I know horstmann valve dont suffer from back voltage so your fault is more likely to be a faulty actuator, you dont need to change the whole valve just the top part (so no need to drain down)

 

[foxhole]

It's already got a new actuator on it.

 

[foxhole]

As far as I know horstmann valve dont suffer from back voltage so your fault is more likely to be a faulty actuator, you dont need to change the whole valve just the top part (so no need to drain down)

As mentioned have changed the valve [twice with current set-up] but still problem, might it be any better with a different brand of 3 port valve.?

 

[picasso]

Who wired your new boiler ? sounds more like a wiring fault than a faulty valve.

 

[foxhole]

RGI installed it and Bosch sent out their guy to look at it, neither could solve the problem?

 

[foxhole]

 

[foxhole]