An awesome team of students from our education program made this wiki.
FoodSaver V4980 Troubleshooting
Bag Will Not Seal
Air leaks into the bag after sealing attempt.
Bag Inserted Incorrectly
Make sure the ridges in the textured bag is running perpendicular to the heat strip. The smooth side of the bag must be facing up. Put the setting on moist instead of dry and attempt to seal the bag again. If this does not fix the problem you may have to replace the seal profile.
Seal Profile Too Wet
Pull out the seal profile, dry it off and reinsert into the machine.
Too Much Liquid In Food
Food gets soggy after sealing process.
Freeze your food first before using the appliance. Attempt to seal your food on the moist setting.
If this does not wok, put the food inside another sealed bag and then inside the given FoodSaver bag.
Reminder: Too much liquid inside the pump WILL cause problems. Remember to drain the pump before using if your product isn't working properly.
Device Does Not Vacuum Air Out Of Bag
Bag is slightly bloated and has not been properly sealed.
Gaskets Not Sealing
Take the seal profile out and wash it. Remember to make sure the bag is in the correct position in the device to seal it properly.
Bag Not Positioned Properly
Rotate the bag 90 degrees and insert it again. Make sure the vertical lines on the bag are perpendicular to the machine's heating strip (or seal profile).
Seal Profile Worn Out
Replace the seal profile.
Accessory Hose Malfunctioning
Check to make sure the accessory hose, if in use, is effectively vacuuming air out. If not, open the bottom panel and see if all the vacuum tubes are connected to the pumps.
Vacuum Pump and Diaphragms Not Working
If the machine makes noise, but no air is being vacuumed out of the bag, the vacuum pump and its diaphragms may need replacing.
Red Seal LED Flashing
LED on the front of the device is flashing
Bag Not Inserted Properly or Unit is Overheated
Remove and reinsert your bag slowly. This may also occur when your machine has overheated. Wait ten minutes and try again.
Reminder: Always wait at least twenty seconds between seals.
Device Does Nothing When Bag Is Inserted
The device has a bag inserted and will not seal or vacuum it.
Faulty Power Source
Ensure that the machine is plugged into a functioning outlet and is turned on.
Dip Tray Full
Clean drip tray, dry it, and reinsert into machine.
Temperature increase can be perceived by laying a hand on the side of the appliance.
Wait ten to fifteen minutes before attempting to use appliance again. Make sure that the appliance is in a well ventilated place and that there are no other electric devices relatively close-by.
Device is Overused
Follow the same procedure above.