Discuss Toilet light not working in the Electrical Forum area at ElectriciansForums.net

SJD

-
Mentor
Esteemed
Arms
Reaction score
1,626
I can think of several causes why the light stopped working, but wonder if anyone did any fault finding, rather than randomly start changing components?

First I'd check the switch? Next, is there an incoming L feed from the previous light on the circuit (fault could easily be at the previous light (or equally a break in the N return)?

You need something more than a neon screwdriver or non-contact 'pen' detector to check properly, these can be misleading.

The fan is probably one of the last places I'd look (other than loose wiring at some badly made junction if the fan was added at some point).
 
Instyle LED Lighting Specialists UK
This official sponsor may provide discounts for members

Pete999

-
Esteemed
Arms
Reaction score
16,787
I can think of several causes why the light stopped working, but wonder if anyone did any fault finding, rather than randomly start changing components?

First I'd check the switch? Next, is there an incoming L feed from the previous light on the circuit (fault could easily be at the previous light (or equally a break in the N return)?

You need something more than a neon screwdriver or non-contact 'pen' detector to check properly, these can be misleading.

The fan is probably one of the last places I'd look (other than loose wiring at some badly made junction if the fan was added at some point).
Me I would change the lamp first!!
 

James

-
Mentor
Esteemed
Arms
Supporter
Patron
Reaction score
3,624
Have you changed any light fittings or switches anywhere else in the property?
Also, turn each breaker off and back on one at a time, sometimes they can trip but still appear on.
 
Reaction score
0
I can think of several causes why the light stopped working, but wonder if anyone did any fault finding, rather than randomly start changing components?

First I'd check the switch? Next, is there an incoming L feed from the previous light on the circuit (fault could easily be at the previous light (or equally a break in the N return)?

You need something more than a neon screwdriver or non-contact 'pen' detector to check properly, these can be misleading.

The fan is probably one of the last places I'd look (other than loose wiring at some badly made junction if the fan was added at some point).
Could it be the switch if the switch has three switches?
 

pc1966

Esteemed
Arms
Supporter
Reaction score
3,640
Sometimes you will find with a toilet that has been added/converted it is powered using a FCU (fused connection unit) from a socket circuit and not, as one might expect, from one of the lighting circuits.

Check at your CU (consumer unit = fusebox) in case there is something that has tripped, but also look around the toilet area for anything looking a bit like one of these:

If so you might find it has a 3A fuse that blew with a failed lamp.
 

SJD

-
Mentor
Esteemed
Arms
Reaction score
1,626
Could it be the switch if the switch has three switches?
I presume you mean a 3-gang switch (one switch is for the toilet, the other two for other lights). Yes, certainly one switch can fail, or even something simple like a wire loose and fallen out of a terminal.
 
Reaction score
37
Sometimes you will find with a toilet that has been added/converted it is powered using a FCU (fused connection unit) from a socket circuit and not, as one might expect, from one of the lighting circuits.

Check at your CU (consumer unit = fusebox) in case there is something that has tripped, but also look around the toilet area for anything looking a bit like one of these:

If so you might find it has a 3A fuse that blew with a failed lamp.
Bathroom light & fan in my house is fed via a switched fused connection unit from an RCD protected ring final rather than the non RCDed lighting loop
 

Reply to Toilet light not working in the Electrical Forum area at ElectriciansForums.net

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
Top