Help with Bathroom extractor fan

1. Is the new fan you bought 12v ac or 12V dc?
2. Did you replace just the fan?
3. Do you know the make and model of the old fan?
4. Do you have a meter to measure the dc output of the power supply? This might be faulty rather than the old fan.

 

To replace like for like, you will need a Extra Low Voltage Timer (ELV) fan and transformer.
Something like this:
MANROSE XF100LVT/SC 100MM (4") AXIAL BATHROOM EXTRACTOR FAN WITH TIMER WHITE 240V (14750)

You have two sets of cables. Both cables have grey, brown and black. Dont get them mixed up! one of those is the mains input. the other is the lower voltage output from the timer transformer to the fan.

Can't comment on the connections to the old fan, can't read the make or model from your long distance photo.

PS, from the location photo, you probably don't need an ELV fan. A mains one is OK.

 

The Toolstation fan comes with its own power supply. They are all different.
You have to change both the fan and the power supply. Hope you havent bu88wered up the fan, the old transformer says 17V on it, and thats a heap bigger than 12V

 

I can see two grey wires at the old transformer….

 

No. You either need to buy a fan that is identical - same manufacturer and part number as your old fan, or you need to buy a fan and its power unit, and fit both parts of the new fan.

 

Correct

 

Are you aware of what wires do what?

 

It tells you what wires do what on the old transformer

 

Yes that's right.

 

Note that the old fan needed three wires going to it from the ******. If you buy the manrose one then that only needs two wires.

 

No, of course not. just use two of the three existing conductors. You can even choose which two you fancy!