Bathroom fan burnt out.....

-Matt · Jun 23, 2018

Had a callout for a landlord as the bathroom fan stopped working.

Didnt take too long to work out why...

Never seen a fan quite as bad as this before!!

Wonder what caused this, possibly got jammed and overheated?

Dillb · Jun 23, 2018

Looks like a manufacturers connection came loose or the coil gave up. Better start fitting fire resistant fans now. Or is that what the supposed 3 amp fuse will stop

telectrix · Jun 23, 2018

but a 3A fuse would have prevented that....... NOT.

Dillb · Jun 23, 2018

telectrix said:
but a 3A fuse would have prevented that....... NOT.

Eggsactly. Yet people on here still argue that its needed cos some leaflet translated from a far east countries language says so.

littlespark · Jun 23, 2018

Is that what all the Chinese text is? It's not spam... they're just sending over instructions for extractor fans.

westward10 · Jun 23, 2018

The 3A fuse is not there to prevent what happened in the OPs pic but to prevent fire, it will always get to that stage in the pic. I know some university carried out some trials with this and the results were hit and miss between not only the manufacturer of the extractor but also the fuse brand.

davesparks · Jun 23, 2018

An appropriately sized fuse designed for use in appliances and built in to the fan would stand a far better chance of preventing fire than a 3A plug fuse

westward10 · Jun 23, 2018

davesparks said:
An appropriately sized fuse designed for use in appliances and built in to the fan would stand a far better chance of preventing fire than a 3A plug fuse

Agreed but when you can get an extractor for two bob and three Woodbines it is not going to happen.

johnduffell · Jun 23, 2018

I get the topic , but being honest Id have thought a thermal cutout would be more appropriate than a fuse to prevent that!

Marvo · Jun 23, 2018

telectrix said:
but a 3A fuse would have prevented that....... NOT.

Fear not, the new arc detection devices will come to the rescue in the near future.....ALSO NOT.

Dillb · Jun 23, 2018

telectrix said:
but a 3A fuse would have prevented that....... NOT.

Marvo said:
Fear not, the new arc detection devices will come to the rescue in the near future.....ALSO NOT.

What you mean maybe they should start producing decent products again?

Marvo · Jun 23, 2018

This is what happens when an 'impedance protected' shaded pole motor is pad mounted in a cheap plastic frame and it suffers a locked rotor condition. The jammed blade means there's no air over the motor to cool it plus the higher LRA means more heat as well. The plastic mounts weren't capable of handling the heat. Not sure it was actually a fire risk because I doubt it would have reached flash point temperature but certainly poorly constructed and designed.

Toneyz · Jun 23, 2018

That's it 18th Am 1 metal fans with shutters.

westward10 · Jun 23, 2018

Marvo said:
This is what happens when an 'impedance protected' shaded pole motor is pad mounted in a cheap plastic frame and it suffers a locked rotor condition. The jammed blade means there's no air over the motor to cool it plus the higher LRA means more heat as well. The plastic mounts weren't capable of handling the heat. Not sure it was actually a fire risk because I doubt it would have reached flash point temperature but certainly poorly constructed and designed.

Interesting, do you think ZP is considered with the construction of a chuck away extract fan.

bigspark17 · Jun 24, 2018

I always fit 3A fuses in fan isolators using click mode modules..If it had started a fire and gone to court the MI would say it states MUST be protected by 3amp fuse if the contractor hasnot followed these then responsibility could be past to the contractor. For the sake of £1 just i fit it!