Stephen White, If machine under warranty, do not disassemble to much as to void warranty. Sounds like the suction tube may be clogged. Links below may aid you in trouble shooting and repair your Dyson. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
https://www.dyson.com/support/dc24new/dc24-animal/my-machine-is-not-working/machine-not-sucking-picking-up-as-well-as-usualdc24
https://www.youtube.com/watch?v=1q3V6YjXn3s
https://www.dysoncanada.ca/en-ca/support/dc24/dc24-allfloors