Foodsaver vac 550 green light doesn't come on and element doesn't heat

Based on the information provided, it sounds like there may be an issue with the heating element of your FoodSaver VS6621, which is preventing it from sealing properly. Here are a few things you can try to fix the problem:

1. Clean the sealing strip: Over time, the sealing strip on your FoodSaver can become dirty or worn, which can prevent it from creating a proper seal. Try cleaning the sealing strip with a damp cloth to remove any dirt or debris.
2. Check the heating element: As you mentioned, the resistance of the heat wire was zero, which may indicate that the heating element has failed. If this is the case, you may need to replace the heating element. Check the manufacturer's website or manual for instructions on how to do this.
3. Check the vacuum channel: If the vacuum channel is clogged or dirty, this can also prevent the FoodSaver from sealing properly. Try cleaning the vacuum channel with a damp cloth and ensuring that it is clear of any obstructions.

If none of these solutions work, it may be best to contact the manufacturer or a professional repair service for further assistance.

I answered a similar question earlier.

Return it to the maker under warranty!

google

make model warranty

Try a local small appliance repair shop for help.

If it appears that the vacuum pump is working well and the seals around the vacuum chamber are clean, it may be a bad vacuum switch on the circuit board.
Turn it over and take out the screws. Inside there will be a small 2x2 circuit board with a 1" round device (the vacuum switch) with a clear tube going from it to the vacuum pump.
On my unit, liquid got into this and rusted the spring so that the contacts and contact plate were corroded and would not make a good electrical contact.
I un-soldered mine from the board, took it apart (by cutting away the edge of the reddish-brown cover) cleaned it all up till the contacts and contact plate were nice and shiny, and clamped and super-glued it back together. Works great now. Make sure you note how far in the vacuum adjustment screw is so you can get it back to the same position.
Or, you may wish to just buy a new vacuum switch off of ebay.

I would recommend a new heating element
http://www.elementsandmore.com/

My FoodSaver vac 550 won't turn off after it's done sealing. what does this mean? Can anyone please help me out.

Go to www.elementandteflon.com and give tthem measurements and they can make a custom element for you.

Check the altitude adjustment. Also, check for food debris in the intake hole, tube or path. Check for debris on the rubber seal around the sealing strip.

look the unit manual HERE

FoodSaver Vac 550 Instruction Manual

FoodSaver Vac 1050 Instruction Manual

FoodSaver Professional II Instruction Manual

My machine stopped working because the sealing ribbon was broken and the tape was worn. FoodSaver no longer does repairs. I knew the wire was called nichcome ribbon so I searched that. I checked the resistance of the ribbon on my machine, it was about 3.8 ohms. I found a site called mpakonline.com and from their site I bought 1/16 x .005 nichrome ribbon and 3/8 x 5 MIL. x 18 YD Acrylic Teflon Tape. The total cost of these items was about $36.00, the ohm value of their ribbon was 1.66 somewhat less.I used ends from radio shack made the repair and it has been working fine for the last two months and I have enough material leftover for about ten more repairs.