Shower extractor fan

[woodywoods]

Hi all, got a very old 3 pin fan that's screaming, changing it to a newer one. It runs from a pull switch but the wiring is strange.....to me anyway
The newer fans just have 2/3 connections so I'm stumped, any ideas?
Probably best to get a sparks in me thinks. Just curious.
Pic attached

 

[mikeyd]

I'd guess one of those black wires is being used as the switched line. Are there any markings on or under the white connector? Looks like it unplugs. Be aware there will be a permanent live on one of those terminals even when it's switched off. If there are no markings then you are going to need a multimeter unless someone recognises the model..

 

[JohnD]

Mark those wires so you can identify them later.

Whatever you do, don't mix up those two blacks, or connect them together.

 

[JohnD]

The newer fans just have 2/3 connections

Your old one also has three terminals.

A multimeter will cost around £8 and help you in a trice.

 

[woodywoods]

Cheers guys, can't see any writing above the red but I guess it's live then I have a N then I have a T. So I guess Neutral and Timer?

 

[woodywoods]

Or Neutral and switch live? Is there a certain type of extractor I need?
Thanks again.

 

[JohnD]

Show us some pics of your entire fan, and measure the duct diameter, and I'll show you one that is better, quieter, and uses less electricity.

Did your old one turn on with the light switch, and continue running for a period after you turned the light off?

How high is it, above floor level (accurately)?

 

[JohnD]

See also

https://www.aldi.co.uk/ferrex-digital-multimeter/p/816792621119500

Error 410 | Screwfix

Thousands of products at low trade prices | FREE next day delivery available | 30 day money back guarantee on all orders.

www.screwfix.com

Rapitest Digital Mini Electrical Test Meter | Wilko

Shop for Rapitest Digital Mini Electrical Test Meter at wilko - where we offer a range of home and leisure goods at great prices.

www.wilko.com

TIS 258 Digital Multimeter With Temperature Probe | Toolstation

A robust, pocket sized multimeter with AC/DC voltage up to 600V and DC current up to 10A. Features Data Hold, Continuity Test and Diode Test facility. Uses 9V battery.

www.toolstation.com

Cat III Digital Multimeter - 600V | Wickes.co.uk

Cat III Digital Multimeter - 600V

www.wickes.co.uk

 

[woodywoods]

Well I didn't think it did....but then I popped it back up checked the pull switch and it worked very loudly. Then I tried the light switch pulley and as it was about to click in the fan made a noise, but we have been using the light and it hasn't been coming on... obviously knackered....so the conclusion is yes it should come on with light

 

[woodywoods]

It's above the shower

 

[JohnD]

This is the best 4 inch one I know

Silent 100 CRZ 4"/100mm Extractor Fan c/w Timer - White | Soler_&_Palau (5210401500 / SIL100T)

Surprisingly expensive but it is also sold under their other brand name (same company)

Silent 100 | Silent WC & Bathroom Extractor Fan | EnviroVent

The Silent 100 is a domestic 100mm silent extractor fan, designed to ventilate bathrooms from a wall or ceiling installation.

www.envirovent.com

Buy whichever you find cheaper.

You want the one with the "T" suffix which means it has a timer

If by any chance your duct runs through the loft and is accessible, you can fit a ducted inline fan that is much more powerful. Otherwise you would need a bigger hole for a bigger fan to get more power.

 

[JohnD]

It's above the shower

But how far is it above floor level?

 

[JohnD]

The one I linked is IP45 Rated so it can be used in zone 1, but the height is important. Measured from floor level.