@derekmullins Outside of opening and closing the cap at the top of the wand, I don't believe there's any kind of adjustment available for the amount of suction. If your suction isn't what it should be, my first guess would be that there's either some kind of blockage in the hoses or a loose connection is letting air in where it shouldn't. Here are a couple of the suggestions from Dyson on troubleshooting, straight from the Dyson DC14 User Guide.
[link|https://www.dyson.com/content/dam/dyson/maintenance/user-guides/en_US/vacuumcleaners/upright-vacuums/dc14/09902-01.pdf|Dyson DC14 Owner's manual|new_window=true]
[quote]Problem / Potential solution
Less than normal or no pickup[br]
• If vacuuming non-delicate carpeting, ensure brush control is set on carpets mode.[br]
from cleaner head or Note: brushbar will only spin when the handle is reclined.[br]
Machine turns off in use[br]
• Remove and check washable filter to see if it is clean (filter should be blue in[br]
color). Wash filter if necessary as shown on page 7.[br]
• If you removed the soleplate, it must be refitted flush with the cleaner head. If it is[br]
not, refit soleplate as shown on page 12 and re-check performance.[br]
• Be sure the filter housing, U-bend, and airway inspection valve are snapped in[br]
securely and confirm there are no blockages.[br]
Less than normal or no suction[br]
• Confirm the U-bend is in place and that there are no blockages.[br]
from wand or hose[br]
• Remove the wand and check for blockages.[br]
• Confirm the hose has no blockages or holes by stretching it out.[br]
• Be sure the filter housing and airway inspection valve are snapped in securely and[br]
confirm there are no blockages.[br]
• Remove and check washable filter to see if it is clean (filter should be blue in[br]
color). Wash filter if necessary as shown on page 7.[/quote]