Honeywell Valve needs changing

[coldice]

Hello,

We have a problem at a mates house whereby the heating stopped working but the water was ok.

A boiler man came round & checked it out & diagnosed it to be the valve and he did something to make the heating come on at the same time the water does & said he would order a new valve.

This was a year ago & he still hasn't returned after numerous calls so I want to see if it's possible to do the job myself at less than half the price that was quoted.

Apparently we need a Honeywell 3 way valve & have seen these going for about £30-£40 at the cheapest. Boiler is a glow worm really old one.

So questions are:

1) How do I know whether need a motorised one or non motorised one?

2) Would I be able to change it myself?

3) If so then how is it done?

Many thanks to all the helpers in advance )

 

[studips]

what's the model number on the old one?

replacement is simple, just buy the right one!

 

[coldice]

Hi,

I'm not sure of the model number as it doesn't say anywhere on it thats visible.

It says Honeywell on it & has some numbers stamped on it saying 8851.

Also there's a little switch kind of thing on the opposite end of where it says this number & it is set to 'open' whatever that means?

Thanks

 

[mysteryman]

You may be able to change the head of the valve if it is suitable, or just the Synchron motor inside it. This is easy-ish - if you know what you are doing. I can't tell you if you can do either of these jobs, so, if in doubt - don't.

 

[coldice]

Ok thanks,

I don't know how to do it but am confident that can work it out if told how & maybe with some instructions from literature.

so can anyone please advise the steps on doing so from the beginning...like does the sytstem need draining? if I unscrew the valves, will there be water there?

Also whats the difference between motorised & non motorised valves & is there any way of knowing which I need?

Thanks

 

[Beerlover]

The model number will be under the meatl hood/cover. Make sure the power is off before removing it - mains voltage present.

If the metal cover has a dimple on it, you can change just the head. If not it is a complete drain down and new valve and head swop requred. As the other guy hasn't come back to such an easy job, I suspect the worst - take a photo of the valve from the side (showing the pipe connections) and take it to a local merchants for advice.

Also beware, Imperial pipework may be present

 

[coldice]

thanks mate,

I'm going to try & take picture & put on here if you lot can advise me.

 

[45yearsagasman]

View media item 30313Is it one of those? View media item 30315Dimple indicates head can be changed as a separate part.

 

[coldice]

its looks like the top one mate...so how do i go about changing it?

 

[45yearsagasman]

The power head can be changed easily.Isolate electrics and remove silver cover.Locate and loosen 2 captive small brass screws and pull head off body.
Fit new head and change/connect wiring like for like.This can only be done if the valve has the later head.(dimple on the cover as shown)
Changing the body is best done by a diyer after draining the system to below the valve level.

 

[expertgasman]

its looks like the top one mate

lol

 

[misterdubya]

its looks like the top one mate

lol

Made me laugh too. As opposed to the bottom pic?

Mr. W.

 

[45yearsagasman]

Perhaps you could let me in on the reason for the laughter.The pics are of the same valve but the bottom one indicates a removable powerhead.
If there is a mistake then please let me know.

 

[expertgasman]

Perhaps you could let me in on the reason for the laughter.

Are you serious?


The pics are of the same valve but the bottom one indicates a removable powerhead.

You said it

 

[45yearsagasman]

So whats funny about that? Just trying to help the OP identifying the valve.