I have a difficult problem relating to a DC07 All Floors. The pre-motor sponge filter is clogging very quickly and suction is being lost. The filter requires rinsing/cleaning every time the bin is emptied. I’ve spent some time researching the cause, looking at this forum, searching the internerd and have carried out the following which has made little or no difference:
- Disassembled the cyclone assembly and cleared all the dust and debris from the fine dust collecting cones at the top and the length of the assembly itself. Inside the blue cyclone assembly is completely clear of any dust/debris as is each individual cone at the top (spray/water cleaned and checked the cones are clear with a bendy torch).
- Checked the Fine Dust Collector Seal which is seated correctly (gripping the bin lid tightly) and there appears to be no obvious sign of dust entry at the base of the blue cyclone assembly. The seal itself has no cracks or holes.
- Checked all hoses and the air path through the unit – no blockages and all seals appear good.
- The pre-motor filter (rigid yellow plastic part) appears good, although you cannot see daylight through it, I am assuming this is still good to use.
- The pre-motor filter (sponge part) is clogged with very fine dust which builds up to form a thick layer, reducing suction to zero if left unchecked. This happens as the bin fills up and needs cleaning every time the bin is emptied.
Given all the above, I cannot figure out why the majority of the fine dust is not being collected at the top of the cyclone assembly part even when the cones at the top and the entire cyclone assembly is 100% clear of dust/debris. Instead, large amounts of fine dust are making their way to the pre-motor filter clogging it quickly.
The DC07 was serviced in December 2012 by a Dyson man-in-a-van. Motor, roller bar and hoses were replaced. This problem was noticed after the service (the pre-motor filter had only been cleaned a handful of times in the several years before this).
Just wondering whether anyone has seen this before. I'm soon to throw the thing out the window if I can't resolve it (which is a shame as it's been great up until now).
Any clues or thoughts would be greatly received. Thanks.