Hi,
My dc07 has poor suction. It makes a loud sucking noise which seems to come from the relief valve on the filter cover housing and so I assume that the suction is being weakened from this. Suction via the top of the hose seems very good. Can tell the suction is poor because pick up is bad when it’s being used. It will pick stuff up, but compared to a friends seba (borrowed in desperation) it leaves loads behind.
I checked all the pipes, cleaned filters, replaced the post motor filter and cleared the top of the cyclone unit where it narrows to small holes (blocked up for a very long time, as I know when the plaster dust got there – 3 years ago!).
Just wondering if there is anything else I need to look at / consider? Is it possible the spring in the filter housing could have got weaker so the relief valve is activated the whole time? I also noticed that;
1. the rigid plastic that the sponge filter sits in, is worn where the filter housing's seal should sit. This is a dyson part that originally came with the dc07
2. The replacement sponge filter and rigid yellow plastic for the pattern part we got a little while ago does not seat well in the filter housing - ie I can see a gap between the foam ring for the filter housing and yellow plastic.
3. The foam ring on the filter housing is a little compressed and is no longer tightly glued to the housing
Having said that, not sure if these affect the by pass valve and nor do I know what "normal" looks like.
Thanks for any advice!
Paul