(1) Unit is overheated. Always allow 20 seconds between seals. Under heavy usage, appliance will shut off automatically and Seal Light will flash. Wait for 20 minutes for unit to cool off before attempting to use the appliance again.
(2) Latch has been left in Operate position: Gaskets may be compressed. Turn latch to Open or Store position and allow 10 to 20 minutes for Gasket to expand. Latch in Operate position for 5 minutes and not being used reminds you to turn latch to Open or to Store positon.
(3) Vacuum pump running more than 120 seconds. Under heavy usage, appliance will shut off automatically and Seal Light will flash.