WB heatlave not responding to stat requests - otherwise working

Exedon · Tuesday at 6:46 PM

If you do change the power head you must use the correct one.
Search with numbers on your existing valve.
The head for the more common V4073A will not do.

HandyAndy20390 · Wednesday at 1:15 PM

Both while:
stat calling and firing/active
stat calling and inactive

brown 245V
red 245V
without much variation apart from initial firing

all the rest appear to be 0
(quite awkward to get a probe in but pretty sure)

I’ve also had the valve manually overridden
which likely unsurprisingly to many gave me CH and hot water

is it possible from this to determine if its the whole valve needing replacing (suspect this)
or just the actuator ?

Exedon · Wednesday at 1:54 PM

Very rarely full valve just the head
But if you get completely valve try changing head first then if necessary change the lot.
They can be err interesting to change!

HandyAndy20390 · Wednesday at 3:31 PM

Exedon said:
If you do change the power head you must use the correct one.
Search with numbers on your existing valve.
The head for the more common V4073A will not do.

Its not so much the V4073A im finding everywhere but V4043H

Are V4043H and V4044F1125 interchangeable ?

*Edit*
Apparently they are not, due to the V4043H being for 2 port

I am finding it near impossible to find a V4044F1125 actuator anywhere
Has anyone tried one of these?

Corgi Replacement Actuator for Motorised Valve

Replacement head for valve, suitable for Corgi or Honeywell body.

www.toolstation.com

Exedon · Wednesday at 3:53 PM

Look for Heating world of spares.
Search on there for Worcester diverter valve.
They have correct part in stock.
The one above will not do.
That boiler requires a diverter valve
Most 3 ports are mid position valves work differently.

denso13 · Wednesday at 4:34 PM

Worcester Part 87161049200 - Diverter Valve - Actuator for Heatslave 12/14 Rso - Most Parts in Stock

thepartcenter.co.uk

HandyAndy20390 · Wednesday at 6:09 PM

Exedon said:
Most 3 ports are mid position valves work differently.

Ah, I did read in the comments of the Corgi that someone had issues because the actuator didnt line up correctly with their particular model

denso13 said:
Worcester Part 87161049200 - Diverter Valve - Actuator for Heatslave 12/14 Rso - Most Parts in Stock

thepartcenter.co.uk

Good to know there is actually an alternative out there !

This looks quite different to what i have - would there be a possibility its proportions wont play nice with the space available

Would you know if it still has the manual override switch? Having one has proven handy in this situation

Also I have found the whole assembly inc V4044F1125 head, new for just a couple of quid more

Seeing as the V4044F1125 could have a bad reputation for not lasting, is it possible your suggestion is more reliable(?)

Overall looks to be a trade off between knowing it'll all fit/spare valve essentially for free
against what is possibly a better head unit ..

Hoping to pull the trigger & order soon so any final thoughts are much appreciated, thanks

HandyAndy20390 · Thursday at 2:04 PM

As a heads up to anyone finding this thread in the future you're probably best just to replace the motor as per this thread here:

B

Thread 'Worcester Heatslave 26/32 hot water but no heating?'

20 Jan 2013

Hi all
first timer at this so be kind please.
I started having intermittent problems with the heating not kicking in, now it wont work at all. I have overridden the diverter valve so using the hot water circuit to get by. Any ideas on what could be the problem?

Regards

Harry Bloomfield · Thursday at 3:18 PM

HandyAndy20390 said:
As a heads up to anyone finding this thread in the future you're probably best just to replace the motor as per this thread here:

Reading the OP's complaint, it does seem to fire up the boiler briefly, which would suggest the motor is running, so it seems to be the mechanism/microswitches failing, rather than the motor. Even if the motor had failed, often the mechanism itself is also worn out - I've been down that road many times over the years, it's usually false economy, and can be highly frustrating.

If the valve spindle is not tight, and not leaking, just replace the actuator head with a new one - once it is confirmed as the point of failure.

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WB heatlave not responding to stat requests - otherwise working

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