Hi Alan, it's Jack at Dyson.
Thanks for the comprehensive information on the issue you're having with your DC25. It sounds very unusual, because if you're getting strong suction through the airway you've labeled in your photograph, there should be nothing stopping the airflow reaching the cleaner head.
It's very important to understand that in order to work effectively, the cleaner head's soleplate must form a close seal with the floor surface. I'm not sure how you're testing suction through the cleaner head, but just placing a hand underneath the soleplate is not an effective way of testing the suction as the soleplate will not be sealed. Therefore the level of suction will feel very different, compared to placing a hand right over the end of the hose.
From what you've described it does sound like your vacuum is working as normal. However for additional assistance, please my colleagues at the Dyson US Support team at
[email protected] - if you can include your serial number and full contact details, we'll be in touch as soon as possible.
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