Difficulty Removing Air from the Bags
If the Foodsaver Pro II is not removing air from the storage bags, first check the bag you are using for leaks by sealing the bag with air then submerge it in water. Apply gentle pressure to the bag and check for bubbles. If bubbles are present, discard the bag and use a new one. If the bag does not leak, make sure that the open end of the bag is placed completely on the vacuum channel; this is located at the front of the unit. Do not let the bag hang over past the channel. Finally, you might check custom-sized FoodSaver bags for wrinkles in the seam. Cut off the wrinkled seam and reseal the bag's edge.
If you have a leaking bag, first check the bag's seal for leaking juices, food crumbs or particles. Cut the bag open and use a clean paper towel to wipe the inside of the bag and remove any residue. Vacuum seal the bag again. Next, check the bag for small holes. Foods with sharp edges can puncture the bag and cause leaks. Remove the food and wrap it in a paper towel. Place the wrapped food in a new bag and vacuum seal it.
If your Foodsaver Pro II is not sealing properly, first make sure to allow the unit to cool down for at least 20 seconds in between sealing bags. Otherwise, the sealing strip will become very hot and melt the bags. Keep the lid open in between seals to help ventilate the unit and prevent it from becoming hot. Allow the unit to sit for 20 minutes to completely cool down if you are still experiencing sealing issues.
Canister Vacuum Sealing Issue
Use a clean, damp washcloth and wipe away any food crumbs from the lid's rubber gasket, then inspect the canister rim for cracks or damage, which can allow air to leak out. Make sure you have at least one inch between the food and the canister lid. Overfilling can cause vacuum sealing issues. Make sure the accessory hose is firmly attached to the accessory port on the unit, and the lid on the canister.