Potterton Puma 80 fan replacement query

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Hi,

The fan on my Puma 80 recently started making a loud whine, so I decided to get it replaced. I bought a brand new "old stock" replacement fan off ebay, but when it arrived, I noticed the fan is slightly different from mine (and different from the pictures it was advertised with - the pictures, including the codes, were identical with my fan). I will contact the seller, who has good feedback, and was communicative throughout the transaction, so I believe it's a genuine mistake.

In the mean time, I'd like to check here if the experts amongst you think I could actually use this fan anyway. The only differences are that the fan casing is very slightly larger, and the motor is 80w instead of the original which is 60w. I checked, and physically the larger fan still fits. So effectively, it seems the only real difference is that it's a bit bigger, which to me seems irrelevant (it can possibly even be a good thing), and the motor draws a bit more current.

The model number of my original fan is 10/18750 and the replacement (the bigger one) is 10/19082.

It's more hassle having to send it back than simply use it, if it's ok to do so, and personally I think I could, but I thought I'd double check here on the forum.

Many thanks!

Vlad.
 
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he only differences are that the fan casing is very slightly larger, and the motor is 80w instead of the original which is 60w. I checked, and physically the larger fan still fits. So effectively, it seems the only real difference is that it's a bit bigger, which to me seems irrelevant (it can possibly even be a good thing), and the motor draws a bit more current.

It's obvious from this that you do not understand how these things work.
 
Thanks for the reply.

Isn't it also obvious I'm posting here precisely for that reason, to get further information on something I'm unsure about? If I knew everything (or thought I know everything), there'd be no need to be here asking questions. :)

I'd be very grateful if you could elaborate.
 
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Forum rules preclude giving out diy gas advice.

I'm not an rgi but can see a good reason that you can't use a different fan.

My advice would be to get a professional to fit the correct part. If you find the right person it might not be as expensive as you might think.

Edit, crossed posts.
 
The only differences are that the fan casing is very slightly larger, and the motor is 80w instead of the original which is 60w.
Larger and more powerful. This could therefore easily push more air into the combustion chamber than the chamber can cope with. This strong draught could detach the flames away from the burner and up into the flu pipe.

DO NOT DO ANY MORE other than TURN OFF THE BOILER and call in a qualified Gas Engineer who knows EXACTLY what to do.

 
It really is very simple.

Certain parts of the boiler are involved with burning the gas. Some of those parts affect how it is burned. Wrongly burned and poisonous carbon monoxide are produced.

Common sense really as well as the forum rules clearly say that no advice should be given on DIY gas repairs. In fact a DIYer should not even be opening up the combustion chamber!

Get a professional.

Tony
 
Got it, thanks guys. :)

I'm looking to see what the best deal on replacing the thing is, as it's old, and just a headache.
 
In the mean time you could just lubricate the old fan bearings, I use old engine oil for this as its already reached high temperatures, although its not a good idea for you to be carrying out these repairs your self as the old fan has been removed you may as well try this and afterwards get a pro in to give the boiler a service.
 

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