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Author Topic: No Power to the Cleaner Head on a DC25?  (Read 52434 times)

Online MVacs

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Re: No Power to the Cleaner Head on a DC25?
« Reply #30 on: November 05, 2015, 07:17:21 PM »
Is that a reset switch? I thought it was the brushroll on/off switch.

This will jog your memory.


Online beko1987

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Re: No Power to the Cleaner Head on a DC25?
« Reply #31 on: November 05, 2015, 07:19:12 PM »
Damn baby brain... Why didnt I remember that...

Push the button! With the machine on and reclined
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Offline Meltman

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Re: No Power to the Cleaner Head on a DC25?
« Reply #32 on: June 17, 2016, 05:46:58 PM »
That'd be great thanks, my multimeter has just arrived so I'll wait to hear from you...

With an assistant.......

Take off the cleaner head, find the two terminals that feed it in the block from the machine, check they have 220-240v AC coming through them. If in the US, that would be 110-120v. For this, the machine will need to be running and reclined, brushbar switch on.

If there is no juice there we look for something else.

As this is public, we should remind the reader that the metal test prongs on the meter may be live during any test, so dont touch them.
I have stripped the brush bar off as it's not rotating. I have pressed the reset button (several times) and still cant get the brush bar to rotate. The machine is lying down and the main suction motor runs ok. Having studied some of your answers I have done some voltage checks with a multimeter and
 there is 240 volts at the connecting plug by the brush head pivot when the brush bar is switched on at the handle but there is no voltage at the motor brushes. My wife says she saw some "flashing" towards the right hand end of the brush bar when she was using the machine....so...am I correct in thinking that the most likely cause of the problem is the printed circuit board?
Thanks for your help.

Online MVacs

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Re: No Power to the Cleaner Head on a DC25?
« Reply #33 on: June 17, 2016, 05:56:43 PM »
Have you checked for DC or AC voltage at the motor brushes?

Offline Meltman

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Re: No Power to the Cleaner Head on a DC25?
« Reply #34 on: June 17, 2016, 06:10:04 PM »
yes, I put the test probes directly onto the motor brushes and I also unplugged the little plug with wires that go to the motor and tested the 2 thin prongs coming out of the circuit board. There was no dc voltage at either.

Online MVacs

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Re: No Power to the Cleaner Head on a DC25?
« Reply #35 on: June 17, 2016, 09:39:27 PM »
You need a PCB but possibly a motor as well; one can take the other out. Test the resistance across the motor terminals.

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Re: No Power to the Cleaner Head on a DC25?
« Reply #36 on: June 17, 2016, 10:07:34 PM »
For the cost of a 25 pcb I always replace both.  I had a 24 pop the old pcb after a new motor once,  never again! I just keep the 'good' pcb incase it comes in handy one day for a quick and cheap repair
Collector and restorer of vintage vacuums, Dyson Appreciator! Come and see my blog, where I am uploading all my mountains of brochures, manuals and other vacuum cleaner paperwork, and also my youtube channel @beko1987!

Offline Chris Simmons

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Re: No Power to the Cleaner Head on a DC25?
« Reply #37 on: March 21, 2018, 01:10:50 AM »
Hi I have a DC25 that has intermittent but mainly no power to the brush head. I put a meter across the head and it seams fine, I checked the micro switch that cuts it out when vertical and that seams to work ok, I checked the loom shown above for continuity on a meter and that seams fine. I pulled the power switches out and the reset, reset is passing current as are both the other power switches so do I guess that the loom from the top to the motor needs checking but how do you get the grey moulding that covers the on of switch and reset of. I took the three screws of and found the clip on the left but it seams to be held by the clip hinge of the dust collection basket.  Any clues how to get that cover of? Thanks in advance.

Online ryevac

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Re: No Power to the Cleaner Head on a DC25?
« Reply #38 on: March 21, 2018, 01:48:38 AM »
insert flat screwdriver into bottom of cover near the bin catch and prise off so far, then pull the top off a little. All done in a see saw action. Usually very tight.

The cut out switch behind this plastic cover can fail, as mentioned before the yoke red/white loom is usually the culprit. The cable can break inside before the plastic outer breaks, you need to check the red / white continuity to head whilst repeatedly moving the head assy back n forth to confirm.

i had this one recently with what i thought was head failure...

The only way to fail is not to try.

Offline Chris Simmons

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Re: No Power to the Cleaner Head on a DC25?
« Reply #39 on: March 21, 2018, 02:00:50 AM »
Thanks for the feed back. checked the loom, tried pulling both ends but will check them again. Just wanted to know how to get that cover of, will be a lot easier to check with it of completely.

Online ryevac

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Re: No Power to the Cleaner Head on a DC25?
« Reply #40 on: March 21, 2018, 02:13:23 AM »
rock it of as i say, top n bottom, try not to prise it off sideways as it will chew and bruise the plastics.
If you get stuck i will do a quick video or a few pics on it in the morning
The only way to fail is not to try.

Offline andyc55

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Re: No Power to the Cleaner Head on a DC25?
« Reply #41 on: March 22, 2018, 09:44:48 PM »
Thanks to the detailed instructions provided by Beko1987 in this post, I've just refitted the Yoke loom on my DC25 and the brush works again!! ;)
Beko1987, you are a great man!!! Ta very much.  :bow:

Offline Ashley69

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Re: No Power to the Cleaner Head on a DC25?
« Reply #42 on: March 28, 2018, 08:17:46 PM »
Thanks to beko1987 for his post on how to change yoke loom assembly.
Great instructions and pictures.
A bit fiddly putting back the wiring but got there in the end.
And thanks to Manchestervacs for supplying the part.

Thanks again.

Offline jryan01

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Re: No Power to the Cleaner Head on a DC25?
« Reply #43 on: June 01, 2019, 11:40:58 PM »
Greetings all, newbie site. Having the same issues with my DC25. Weird thing...when i touched the leads coming from the loom, it sparked and the brush got power...any thoughts? Thanks!

Jeff

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