Ffm162lsa turns on but won't cook

U gotta turn up the wattage..

You may have a shorted door switch or a shorted relay on the control board.

You can see a help file on door switches here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

From your description you have a bad door switch, there are usually a few of them located inside the microwave under the keypad control board that will need a digital meter to trouble shoot.

Check to see if it has a DEFROST SETTING if Defrost setting is on it will not reach an adequate temperature

If there is no heat, then it's probably a defective magnetron.

One or two of the door switches has failed, replacement only option, consider price.

There probably is a bad micro switch that needs to be changed.

No; generally, salsas hardly ever require cooked tomatoes, and raw tomatoes are soft enough that pretty much all strainers are capable of handling them. You could blanche them to remove the skin (a tricky process I won't describe here), but that's about as cooked as they usually get. If you are concerned about the strainer's ability to handle the tomatoes, just cut them in half or into quarters, and you should be all set!
Hope this helped! :)

www.digi-key.com or www.newark.com stocks those fuses.