Dyson & Sebo Vacuum Cleaner Repair & Advice Forums

Dyson Models => Dyson DC07 => Topic started by: rob_520 on March 09, 2016, 06:47:47 PM

Title: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 06:47:47 PM
why has the release valve stopped working on the side it wont oped when you block the hose ... all filters have been change no blocks in the pipes any ideas ?????
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: MVacs on March 09, 2016, 07:47:57 PM
It wants stripping and cleaning.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 09, 2016, 07:49:23 PM
Yeah a good clean out would benefit it no end dude! 
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 08:00:38 PM
its been totally stripped  and deep cleaned inside and out all filters replaced all airways have been fully cleaned and still wont open the valve when you hold your hand over the hose so I am stumped but thanks for your answers
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: MVacs on March 09, 2016, 08:35:09 PM
No, the valve wants stripping and cleaning.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 08:46:29 PM
well ive done that and cleaned the valve ... ive tried it on another machine and it works .its doing my head in can't understand it it should work but don't but thanks for all your answers keep them coming just incase ive missed something many thanks
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 09, 2016, 08:53:52 PM
Okey,so let's step back and take a recap here... You've stripped and cleaned the whole unit, and also stripped and cleaned the Valve.
Then, you tried the valve on another unit and it works as it should, but back on the original machine and it's not working.

Have you checked for obstructions stopping it from opening? Such as a small bit of debris, perhaps it's not fitted quite right?
Have you done the opposite and tried the working Valve from the unit you tried this one in, on the original unit? Does that work?

I'll await your reply while sipping Whiskey and sitting in my arm chair.   :reading:
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 09:25:36 PM
yes i've done all that .all what you said I removed the valve spring the the black top piece that sits inside cleaned all that .put it on another machine and it works fine .I checked for piece of grit dust etc. I made sure that the black rubber ring is fitted inside. I even changed the motor house cover just incase the rubber was not sealing and no difference .ive checked all the other seal and changed them from a working machine still the valve wont open .and of course if that don't work it will burn the motor out in time .so hence I'm really scratching my head and fingers are soare lol many thanks for all your help
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Madrat on March 09, 2016, 09:34:52 PM
Could the machine be sucking air from somewhere else?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 09:38:52 PM
ive even tried different hoses p tube u ends still the same checked everywhere for leaks nothing I can find
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 09, 2016, 10:18:31 PM
Take off the side valve pipe and block the suction with your hand. Does it release the valve easier? If so, the problem is between the u bend and wand. If not, there's probably an issue with the cyclone. Maybe the cyclone seals are worn?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Madrat on March 09, 2016, 10:32:55 PM
Is this a dc07 or a dc33???
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 10:45:36 PM
sorry its a 07
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Madrat on March 09, 2016, 10:52:37 PM
OK thanks.

There are no seals in the cyclone.  Have you tried swapping the cyclones over?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 09, 2016, 11:09:30 PM
yes I have tried one from another machine that works fine and still no joy
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 10, 2016, 07:25:30 AM
I'm still unclear whether you for the valve from the other machine that works and tried it in this troublesome one?
I know you put the troublesome valve in a working machine but try the other way around.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 10, 2016, 04:28:47 PM
ive tried everything I know with no luck changed all the seals p pipe ubends you name it ive tried it still does not work but when you take it off put on another machine it works fine
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Madrat on March 10, 2016, 04:49:12 PM
  Dose the one off the other machine work on yours.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 10, 2016, 05:09:13 PM
  Dose the one off the other machine work on yours.

Exactly what I've been asking all along  :grinn:

Lol.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 10, 2016, 05:20:05 PM
the one that does not work no matter how many filter covers you try it does not work ..put all the filter covers on another machine and they work fine ...hope I've been more clearer thanks for all the help
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 10, 2016, 05:33:01 PM
Well not really to me, but if you've swapped the valves over and the one from the good machine doesn't work in the other one then I'm unsure how else to help...
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 10, 2016, 06:04:06 PM
I will not give up on helping you, Rob. If it's a Dyson, there is nothing that is impossible to fix on a Dyson

So, With your "faulty" valve/filter case on the DC33, put it back on the DC33. Take the cyclone off and switch it on. Block the suction at the top of the tube which is sucking. Hold it for about 5 seconds. Does it work? Please remember that on some machines the release valve may be quicker than others. A Dyson Dc04 has an extremely fast valve in the cyclone. Some machines may have been blocked soo many times in the past that the air relief valve goes off quicker than a Dyson which has been looked after well.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 10, 2016, 07:19:28 PM
yes have done that your 100% when I do that it does work whats the next step many thanks
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: MVacs on March 10, 2016, 09:07:54 PM
Topic renamed so it makes sense...........

the one that does not work no matter how many filter covers you try it does not work ..

So this is a suction problem on your DC07. There isnt enough suction at the filter housing to activate the relief valve. As the valve works on other machines.

So we are looking for a leak elsewhere on the machine methinks. Crack in the chassis, missing seal, or some such.

Try it without a filter, does it operate then?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: beko1987 on March 10, 2016, 09:36:13 PM
try it without the cyclone too,  take it off then block the suction on the chassis with your hand.

Is the rubber seal fitted to the filter housing? Did you dislodge the seal that sits on the motor housing?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Tonymini145 on March 10, 2016, 10:05:50 PM
Hair line crack in the body ?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 10, 2016, 10:07:02 PM
What are the first 3 digits of the serial number on the vacuum that doesn't have a working valve? The serial number is found either underneath the vacuum or behind the bin
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 10, 2016, 10:32:26 PM
Things like this are very hard to fix without actually having it in front of you.
It's like on the Car forum I used to mod, people would post a thread saying their car won't start... So you go through all the easy bits but then it becomes a case of actually having to have it in front of you to diagnose it.

usually, however with a little guidance and common sense + growing knowledge the OP can find the problem... 
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: beko1987 on March 10, 2016, 10:39:00 PM
It sounds like the sort of issue that would have me stumped for a day or two,  but then be blindingly simple when I finally worked it out!
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 10, 2016, 10:42:09 PM
tried it without the filter and it worked valve opened ....took the cyclone off blocked the air intake it worked valve worked and opened ...I have a dc07 and a dc33 both have the same problem .....have done loads of these never had this problem before .all seals are present all filters have been changed for new ones ...all airways have been cleaned and no blocks in them...no cracks in the bodywork .dc33 ones had a new cyclone gasket aswell  ...as I say done quite a  few of these now and never comes across it before. thanks everyone for trying to help me
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: MVacs on March 10, 2016, 10:56:18 PM
tried it without the filter and it worked valve opened ....

How are you washing you filters?

Rinsing them under the tap and drying them (as Dyson suggest) is next to useless. We pressure wash them and then bung them in the washing machine.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 10, 2016, 11:10:42 PM
no the filters are brand new
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: RustySkull on March 11, 2016, 08:27:11 AM
I know you've checked but check again for cracks, gaps etc... It can't just not work there has to be a cause.
And if you have a machine that the valve works, but that same valve in this machine it doesn't work then that points to that machine being faulty. Not the valve.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: beko1987 on March 11, 2016, 01:34:39 PM
Yep,  you do seem to have an air leak somewhere.  Whats the changeover valve like? I had one that had a small crack in the big ring that sits over the big spigot on the chassis,  and that lost air.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 15, 2016, 10:36:34 AM
if I take the cyclone and its bin off hold my hand over the the air intake it works really strange
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 15, 2016, 10:41:50 AM
Maybe the cyclone gaskette needs to sit flush, I made that mistake when doing it for the first time on my DC25. Take it apart and try again. Also, take off the valve pipe on the side and block the suction with the palm of your hand. Will it work?
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 15, 2016, 11:11:31 AM
checked the gasket its new and is sitting flush ....take the side valve/p tube off hold my hand over it the valve opens  I'm baffled
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 15, 2016, 12:26:02 PM
Check the valve pipe if it has the seal fitted
Title: Re: Dyson DC33 Relief Valve Problem.
Post by: rob_520 on March 17, 2016, 04:15:53 PM
right not to be one to get up lol...I have been through everything .today I thought new day another look .and I thing I found the problem .took the wand out  hold my hand over the hose without the wand and it works ..don't have another dc33 wand so I put a dc14 wand in there as a temp thing to test ..held my hand over the top of the dc14 wand and  the valve opened ....must be the seal in the wand gone ...thought I would share this incase anyone else has the same problem ..thanks for all the suggestion though
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 17, 2016, 05:05:02 PM
Oh DC33 wands are crap, I had to get a new one from Dyson under warranty because there's a white circle plastic thing which acts as a seal! They always come loose and have seen DC33's often with this issue

I would say the DC14 wand is the best design
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: rob_520 on March 17, 2016, 05:56:02 PM
I think this one is missing don't know if anyone has a picture of the inside of the wand so I can see whats missing probley have to get another wand lol
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Madrat on March 17, 2016, 07:40:04 PM
I've come across quite a few dysons (all different models, but mainly newer ones) where blocking the wand doesn't operate the relief valve but blocking the hose dose.
Title: Re: Dyson DC07 Relief Valve Problem.
Post by: Parwaz7862 on March 17, 2016, 07:52:17 PM
My dc24 wand leaks suction and its quite a lot!