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How to test boiler fan?


 
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babaton

from United Kingdom

Joined: 18 Oct 2010
Posts: 5
Location: Surrey,
United Kingdom

PostPosted: Mon Oct 18, 2010 3:17 pm Reply with quote

Hi, This is my first post, I'm hoping some of you guys can help me....

My boiler has just gone on the blink.

It just stopped lighting and it makes a loud whirring noise. I removed the cover and I can see the fan isn't spinning.

So , I tried to spin the fan with my hand and it's really stiff, "the bearings" I thought. Removed the fan but once it's removed the fan moves freely.

If I turn on the boiler without the fan connected there's no whirring but of course the boiler doesn't light.

So, can I test the fan? I just want to put a current across it and see what it's doing but I'm not sure about the best way to do that.

Is it possible for the motor to be **** in such a way that when it's on it'll try to alternately spin one way and then the other? resulting in a loud whirring and no movement?

I'm really hoping it's just the fan as they are only 40 on ebay....

HELP!
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Boilerman2

from United Kingdom

Joined: 10 Jun 2009
Posts: 4919
Location: Suffolk,
United Kingdom
Thanked: 919 times

PostPosted: Mon Oct 18, 2010 4:36 pm Reply with quote

What make & Model Boiler do you have some boilers have D.C. Fans others are 230VAC sounds like the fan motor has had it with a knackered shaded pole motor the fan will spin freely untill power is applied it then locks up new motor should sort it by the way you should not be changing this yourself as it is classed as Gas work and leagally you have to carry out specialist tests on completing the work to ensure that the boiler is safe and not spilling Carbon Monoxide into your home

Get in a pro to do this work for you and be wary of non original parts sold on E-bay you could invalidate any warranty and infringe gas safety regulations icon_wink.gif
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babaton

from United Kingdom

Joined: 18 Oct 2010
Posts: 5
Location: Surrey,
United Kingdom

PostPosted: Mon Oct 18, 2010 4:55 pm Reply with quote

It's a potterton profile 80.

I didn't think I'd need to worry about getting an engineer as I'm not going near the actual gas.
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mickyg

from United Kingdom

Joined: 24 Aug 2005
Posts: 15941
Location: Hertfordshire,
United Kingdom
Thanked: 3198 times

PostPosted: Mon Oct 18, 2010 5:00 pm Reply with quote

babaton wrote:
It's a potterton profile 80.

I didn't think I'd need to worry about getting an engineer as I'm not going near the actual gas.


the fan affects combustion as could your actions, IT IS GAS WORK. You should be engaging an RGI for this work.
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kevplumb

from United States of America

Joined: 18 May 2004
Posts: 23673
Location: Georgia,
United States of America
Thanked: 918 times

PostPosted: Mon Oct 18, 2010 5:02 pm Reply with quote

Quote:
I'm not going near the actual gas.


and where does the "actual gas" go after it leaves the burner icon_eek.gif

and the profile is a positive prressure boiler as well icon_eek.gif
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mrgas

from United Kingdom

Joined: 13 Nov 2007
Posts: 1773
Location: Sussex,
United Kingdom
Thanked: 211 times

PostPosted: Mon Oct 18, 2010 5:27 pm Reply with quote

You have already got too 'close to the gas'.
Best advice I can give is get yourself a Gas Safe person round.
Dont buy any boiler components from ebay.
Switch the mains off to your system and leave it off until a gas safe person has repaired it.
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