DIY Doctor

Main navigation

New Bathroom Ceiling Extractor off When Light on and on When Light off?

Postby mrstmls » Tue Mar 01, 2016 10:51 am

Have replaced old Manrose ceiling extractor fan in our bathroom with new one, BVF100S standard model. The previous fan was wired so that it came on and off when the ceiling light pull cord was used. Connecting the new one was no bother, but is comes on when the light it turned off and goes off when the light is turned off. What went wrong?
Rank: Labourer
Progress to next rank:
Posts: 1
Joined: Tue Mar 01, 2016 10:46 am


Simply Build It

Postby ericmark » Tue Mar 01, 2016 6:59 pm

Wired between lamp switched line and permanent line would do that. When the lamp is off the switched line (often blue wire with a brown sleeve on it) will be connected by the lamp to neutral.

Likely you have just selected switch line and line instead of switched line and neutral so likely the permanent line is brown and is used for run on only and this is where the neutral should be.
Rank: Project Manager
Posts: 2639
Joined: Fri Oct 02, 2009 8:49 pm
Location: Llanfair Caereinion, Mid Wales.

Display posts from previous
Sort by
Order by

  • DIY How to Project Guides
  • DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!

  • Related Topics