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Author Topic: DC40 - popping noise followed by poor performance  (Read 1135 times)

Offline mrice

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DC40 - popping noise followed by poor performance
« on: October 24, 2017, 10:02:09 PM »
Good evening

I have a Dyson DC40. While in use, I'm told that it made a 'popping noise' and the note of the motor changed. After searching around the web I've done the following - washed and dried the filters, cleaned out all the pipes and head unit, dismantled and cleaned the cyclone unit. This has resulted in some improvement to the motor noise but suction is extremely weak - it sounds like the motor is not experiencing much load. I've read about a bleed valve which is responsible for symptoms like this and see replacement ones for sale but I've been unable to work out where on the machine this might be.

Any advice gratefully received.

Online MVacs

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Re: DC40 - popping noise followed by poor performance
« Reply #1 on: October 25, 2017, 01:04:06 PM »
If it's popping that usually signifies the motor is on its last legs.

Any acrid plastic electrical smell?

Offline mrice

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Re: DC40 - popping noise followed by poor performance
« Reply #2 on: October 25, 2017, 09:36:51 PM »
Thanks for the reply.

Yes there is a smell similar to the one you describe - does that confirm your suspicions?

Thanks.

Online MVacs

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Re: DC40 - popping noise followed by poor performance
« Reply #3 on: October 25, 2017, 09:44:20 PM »
Yes, you need a main motor.

If you fancy a dabble, ours are >here< and there is a strip down topic >here<

I'll warn you though, they are not a fun job. And we have a new one at 199.  :whist11:

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