The World's #1 Vacuum Cleaner Advice, Repair, Discussion & Information Forum

Author Topic: thermal cutout maybe defective  (Read 2137 times)

Offline ringer

  • Member
  • Posts: 21
  • Country: gb
  • Gender: Male
thermal cutout maybe defective
« on: December 06, 2019, 01:39:53 PM »
Our DC04 (S/N 160-UK-166597) packed up but then a few days later it
mysteriously revived. I thought that maybe the airways or filters got
clogged & the motor overheated. I took it to pieces: no blockage &
the filters almost clean. Please does anybody have an alternative idea
why it should have stopped & restarted?

You sell TOCs. Please are these self resetting? I understand that non
resetting TOCs are supposedly safer, but I cannot bear the thought of
having to take the whole machine to pieces in order to reset the TOC
by hand.
mark

Online MVacs

  • Administrator
  • Member
  • *****
  • Posts: 5718
  • Country: gb
  • Gender: Male
    • Manchester Vacs -- The Independent Dyson Specialists
Re: thermal cutout maybe defective
« Reply #1 on: December 07, 2019, 11:20:43 PM »
All Dyson TOCs reset on their own.

It may be faulty but its highly unlikely.

Have you bench tested the motor to see how it runs?

Offline ringer

  • Member
  • Posts: 21
  • Country: gb
  • Gender: Male
Re: thermal cutout maybe defective
« Reply #2 on: December 08, 2019, 01:19:25 PM »
[CUT]

Have you bench tested the motor to see how it runs?

No, I dont know how. It does run. Reading other posts, it seems that I must
extract the motor, tether it somehow, & run it. What should I look for? How
much current should it need? Thank you.
mark

Online ryevac

  • Member
  • Posts: 582
  • Country: gb
  • Gender: Male
  • Optimism is the faith that leads to achievement
Re: thermal cutout maybe defective
« Reply #3 on: December 08, 2019, 01:54:14 PM »
I have had one only that did this on an old dyson cylinder, ended up been brushes were just about worn out - causing excessive current drawn. brushes sorted it.

As Stu says, very uncommon for them to fail.
Just strip machine, the 04 is only a 10 min job to get motor out.
The only way to fail is not to try.

Offline wolf

  • Member
  • Posts: 20
  • Country: gb
  • Gender: Male
  • dyson repairer
Re: thermal cutout maybe defective
« Reply #4 on: December 08, 2019, 02:27:44 PM »
Unscrew the carbon brush holders and look at the brushes are they badly worn is the spring tension ok
how much of the carbon is left on each side, if their ok look at the commutater on the armature for a segment burning away if their is no sign of any of these problems re assemble motor and strap it down side ways and wire it up try it with a 5A fuse,
On the other hand you could be digging to deep it may be a fault in the main lead have you got 240 voltage all the time even when you move the lead about
wolf

Online MVacs

  • Administrator
  • Member
  • *****
  • Posts: 5718
  • Country: gb
  • Gender: Male
    • Manchester Vacs -- The Independent Dyson Specialists
Re: thermal cutout maybe defective
« Reply #5 on: December 08, 2019, 06:44:23 PM »
On the other hand you could be digging to deep it may be a fault in the main lead have you got 240 voltage all the time even when you move the lead about

Yes, that's well worth a look as well. Waggle the lead and see if it goes off.

DC04 Spare Parts


 

 

FFP2 N95 Face Masks

 

 

Dyson Spare Parts

 

 

Freestanding Dyson Cordless Vacuum Stand

 

 

Buy a Dyson DC04 Wand Handle

 

 

 

 

Sebo Vacuum Cleaners

 

 

Instagram

Dyson Spares, Parts, Advice   Follow us on Twitter

Manchester Vacson Google+

Manchester Vacs on Instagram

Registration