Hi there! Thanks for reaching out here. This could be an issue with the Air pressure, we would like to assist you further with this matter. In this case we would suggest using your machine in ECO mode to prevent this from occurring. If this option is not ideal for you please send a message here with your machine serial number and the email address used to register your machine. I am happy to look further into this for you. 

Thank you for the reply and the offer for further assistance. After having a first V15 replaced for not displaying the particle counter, and then about 2 dozen chats/emails and several failed shipping attempts for a replacement laser head (that wasn’t the problem), I’m kind of done with the whole thing. Eco works OK, and I love the vacuum otherwise. I don’t think the first machine had this same problem so I’m wondering if there is some production variance in the sensitivity of the pressure sensor. I was simply wondering if there were others with this problem. If so, a redesign of the head or a sensor update by Dyson might be in order.

I do understand your concerns. If you could reach out to me by message I am glad to assist further and see what options we may have to help here. 

Hi I’m curious what the resolution to this issue was? I also live at about 9,200 feet above sea level and am experiencing this exact same issue. This was the first mode I tried out of the box. Everything else works fine but it’s a bit disappointing considering this was the most exciting feature of this new Dyson model. 

Hello, Mm,

While I’m sorry that you also have this same problem, it’s nice to know that I’m not imagining things! There has been no resolution. The machine has worked flawlessly … as long as I remember to switch to “eco” when using the laser head on bare floors, and then switch back to “auto” when doing everything else. It’s not an ideal situation, as the low “eco” speed doesn’t generate huge amounts of vacuum, but it’s OK, and the laser’s ability to point out debris is still really useful. Thanks for the reply!

While I’m back here after so long, I might just generally comment on how difficult it was at the time to try to get this problem directed to Dyson. I had endless “chats” with Dyson “experts”. These clearly were not experts at anything, but simply a communication service outside of the US and UK. I’m not sure anything I wrote was even understood, let alone communicated to the company. It’s unfortunate that Dyson has seemingly insulated themselves from useful information regarding the use of their products in the wild … in our cases, the highlands.

This seems to be a reoccurring issue with the V15. We are not at altitude (~500 ft) and have the same issue. Auto mode, laser bare floor head, thinks the airway is blocked.  If I quickly switch it to eco, it works fine. Every other attachment, it works fine, only this head with auto. Tried taking off and adjusting the filter, and that didn't work either.  We didn't pay this much for vaccums to have to create a "work around"  

Will be calling customer support to see what we can do to resolve. 

That’s interesting. It was definitely altitude that was causing my problem (along with Dyson’s design) because we recently moved from 9150’ to 2600’ in another state and the vacuum now works perfectly on all speeds and with all heads. Of course, one shouldn’t have to move to get a pricey vacuum to work, so it seems apparent that there is a design flaw in the airflow with the laser head. That yours is doing the same at such low altitude is even more of a puzzle. Again, I had to send mine to Denver (the nearest facility), and it worked fine at that lower altitude. Your case may involve other issues. I do recommend getting it looked at by a Dyson tech if you can, and potentially get a replacement.