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PostPosted: Fri Oct 20, 2017 5:29 pm 
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Hi there,

I've been having an issue with my bathroom extractor fan - quite sure I know what the issue is but thought I'd check with you good folks before electrocuting myself!

To sum up:
* Fan always runs, whether lights are on or off
* Definitely a switched fan - there's a live and a switched live input for wiring, both are connected
* There's a LED power light on fan. It goes off after a while when the lights are off, but fan continues to operate. When i switch lights on, the LED turns back on

My guess here is that the live and the switched live are swapped. Would that make sense and result in above behavior?

Happy to take photos as required!

Thanks


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PostPosted: Fri Oct 20, 2017 5:33 pm 
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More information is required.

Has the fan recently been changed?
Has any wiring recently been changed?
Is this a brand new installation?

Anything else you would like to tell us?

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No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

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PostPosted: Fri Oct 20, 2017 5:35 pm 
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someone-else wrote:
More information is required.

Has the fan recently been changed?
Has any wiring recently been changed?
Is this a brand new installation?

Anything else you would like to tell us?


Moved into this place 6 months ago. Fan doesn't look new. No idea of history re: changed wiring.
Identical fan in another bathroom works as intended - stays on for 5-10 mins after you switch off lights, then turns off. This one just remains on.


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PostPosted: Fri Oct 20, 2017 5:36 pm 
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I'd hazard a guess that you are correct. Lecky off and swap live/permanent live.

If that doesn't work then the timing circuit has probably failed... not normally a replaceable part so time for a replacement fan.

(could also be a humidity stat failure, but you don't mention a humidistat)

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PostPosted: Fri Oct 20, 2017 5:38 pm 
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wine~o wrote:
I'd hazard a guess that you are correct. Lecky off and swap live/permanent live.

If that doesn't work then the timing circuit has probably failed... not normally a replaceable part so time for a replacement fan.

(could also be a humidity stat failure, but you don't mention a humidistat)


what's worst that could happen if i swap permi live + switched live? Fan just wouldn't turn on right?


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PostPosted: Fri Oct 20, 2017 5:42 pm 
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I am thinking the timer has given up, but swapping Live and switched live will do no harm.

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Take it easy, a forum is only a collection of opinions. Above, are mine.

Which is correct? Metre or Meter? Click the link. to find out more.

No such thing as "Thou shalt put this wire here, Thou shalt put that wire there" .............Take a picture BEFORE you do the job.

If gloom had a voice, it would be me. :mrgreen:

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PostPosted: Fri Oct 20, 2017 6:40 pm 
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chamsters wrote:
wine~o wrote:
I'd hazard a guess that you are correct. Lecky off and swap live/permanent live.

If that doesn't work then the timing circuit has probably failed... not normally a replaceable part so time for a replacement fan.

(could also be a humidity stat failure, but you don't mention a humidistat)


what's worst that could happen if i swap permi live + switched live? Fan just wouldn't turn on right?


exactly. or the fan would still constantly run as it already does.

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PostPosted: Fri Oct 20, 2017 7:04 pm 
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someone-else wrote:
I am thinking the timer has given up, but swapping Live and switched live will do no harm.


Doing that should make the fan act a non timed fan ie it will only switch on with the lights (works with 99% of timed fans).

So unless the wiring to the fan is incorrect, that should prove that the timer is faulty.



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PostPosted: Fri Oct 20, 2017 7:10 pm 
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wine~o wrote:
(could also be a humidity stat failure, but you don't mention a humidistat)


Very possible. Or an incorrectly set stat.



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PostPosted: Sat Oct 21, 2017 9:00 am 
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A model may help if you can see a humidistat will have a small sensor on board to sense air levels and have an adjustable screw or knob on it normally with a + - on there.

Sent from my LG-K100 using Tapatalk


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PostPosted: Sun Oct 22, 2017 10:49 am 
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Surely the fan has been running fine up till now, have the wires magically swapped over on their own? I would say it is either a faulty pcb causing the timer fault, or the timer needs turning down, or the fan has a humidistat and that needs turning up.


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PostPosted: Sun Oct 22, 2017 10:52 am 
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Hi folks,

OK so there was no impact turning up the timer. Could not find humidistat. Ended up getting replacement fan on amazon for £15, installed last night and it works great with same wiring set up.

So - was definitely an issue somewhere on the old fan, likely a shot timer.

Thanks for the help!



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PostPosted: Sun Oct 22, 2017 10:54 am 
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Great glad all sorted

Sent from my LG-K100 using Tapatalk



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