1. Please confirm where the leak is coming from. If your machine is leaking from the bottom of the solution tank, please see our FAQ regarding the leak from the Solution Tank.
2. Make sure the separator stack inside the collection tank is in place properly. The arrow on the separator stack should be in line with the lock icon on the collection tank. If it is not locked into place, the collection tank will leak or you will have leaking out of the bottom of the machine. See picture:
If the leak is actually coming from the bottom of the machine (and step 2 is not the issue), please contact BISSELL Consumer Care at 1-800-263-2535 Monday through Friday 8:00 am - 10:00 pm; Saturday 9:00 am - 8:00 pm; Sunday 10:00 am - 7:00 pm EST for further assistance.