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apguy

Original Poster:

664 posts

131 months

[news] 
Tuesday 12th February 2013 quote quote all
So I have an Ideal Classic FF250 with a seized fan. Apparently a common problem on these things.

Symptoms were easy to spot; the irritating squeek from the fan assembly, that had persisted for the last month was gone, and the inability of the bolier to switch on the burners was a sure indication something was amiss.

A bit of WD40 on the fan bearings means I have heat at the moment, but I need to replace the fan.

But how the flip do I remove the fan/venturi assembly?

A replacement looks like this ( ebay piccy) and after taking off the boiler cover I can see it sitting on top of the combustion chamber.

But I can only see 2 screws holding the venturi (with fan inside) to the boiler. One on the front, mounted on a small tab and another at the back, securing the venturi outlet to the flue pipe.

Now I'm sure there's more as I can't lift the fan assembly off. Any pointers, indicators or general finger pointing regarding messing with boilers welcome.

ta


Ferg

15,242 posts

140 months

[news] 
Tuesday 12th February 2013 quote quote all
You have to take the flue hood off and the fan is secured to that by three screws from the inside. From memory there is a rope seal on the top which may disintegrate.

apguy

Original Poster:

664 posts

131 months

[news] 
Tuesday 12th February 2013 quote quote all
Thank you Ferg. I was hesistant to undo the nuts on the 2 ties rods as they looked fairly important.

As a nice picture is worth a thousand words, I think I need to



(After your post, I searched for an online manual, and the lovely folks at Ideal have it at: http://www.idealheating.com/downloads/manuals/1566... and I've nicked the picture)

Andrew[MG]

2,805 posts

81 months

[news] 
Tuesday 12th February 2013 quote quote all
Are you sure it needs a new fan? I can't remember which model I have but the blades shattered, I fired in some wd40 and it's been running fine without the blades ever since. The new kit doesn't seem to come with blades at all http://www.ukheatingparts.com/ideal-classic-fan-as...

Unless you mean that the whole thing has seized and then I have no idea smile

GuinnessMK

1,237 posts

105 months

[news] 
Tuesday 12th February 2013 quote quote all
I replaced the fan on my FF250 a few years back. It's no more complex than undoing a few nuts / screws and then doing it all back up again.

Word of warning though, during the death throws of the fan, I kept applying WD40 to keep it going. Then one day I'd run out of WD40, so used graphite penetrating spray. Don't turn the fan on with the cover off, unless you want a thin spray of graphite all over the kitchen walls, units, worktops etc!
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andySC

446 posts

41 months

[news] 
Tuesday 12th February 2013 quote quote all
Try cet-ltd for reconditioned fans. Half the price of the new unit. They put new bearings in, rewind the motor & even give it a lick of paint & stick a years guarantee on it.

Martyn D

424 posts

57 months

[news] 
Tuesday 12th February 2013 quote quote all
As well as the 2 front tie rods there's also a screw at the back of the combustion cover which is directly under the flue, undo the screw that holds the flue onto the fan and twist the flue and slide it towards outside (it's a small telescopic section that'll slide into the inner flue part going through the wall) then you can access the screw, also there's a sensing tube (white I think) that goes onto the back of the combustion cover, don't forget to put it back on before you fix the cover back down.

silversurfer1

222 posts

19 months

[news] 
Tuesday 12th February 2013 quote quote all


Martyn is correct there is a small screw directly under the rear of the fan that holds the flue hood on and it can be a *astard to undo you will need an angled screw driver or just a head from a set and a small spanner to fit it.

Good luck

j


apguy

Original Poster:

664 posts

131 months

[news] 
Wednesday 13th February 2013 quote quote all
Thank you for all the assistance. Especially the bit about another hidden screw!

mercurial1000

2 posts

8 months

[news] 
Friday 22nd November 2013 quote quote all
Is there any adjustment to be made if you refit one of these?

silversurfer1

222 posts

19 months

[news] 
Saturday 23rd November 2013 quote quote all
mercurial1000 said:
Is there any adjustment to be made if you refit one of these?
not to the fan , but id re commission the boiler.

ss



NH1

1,333 posts

12 months

[news] 
Saturday 23rd November 2013 quote quote all
Isn't wd40 flammable, not the best thing to spray near a sparking motor, actually I dont think them motors have got brushes. Anyway still dodgy.

Rickyy

4,557 posts

102 months

[news] 
Saturday 23rd November 2013 quote quote all
WD40 is no good on a fan motor, it gets too hot and evaporates pretty much straight away.

You can buy purpose made "Fan Lube", which is thicker and seems to work wonders, but is highly flammable!

The risk doesn't come from sparking (you shouldn't be working anywhere near a live fan anyway!) but from the heat of the fan. An old colleague of mine managed to burn himself when the lube ignited as he sprayed it onto a hot fan!

mercurial1000

2 posts

8 months

[news] 
Saturday 23rd November 2013 quote quote all
silversurfer1 said:
not to the fan , but id re commission the boiler.

ss
commission the boiler? that sounds like starting from square one,
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