There would be two fans, one outside and one inside, both must work. If the compressor works, does the compressor output small line get hot and the return cool or cold? On the outside radiator or condenser, inlet should be hot and outlet cool/warm to touch.
Sounds like it was having a defrost problem which could be caused by a few things but the most common would be the defrost timer could have been sticking, it's set to go into defrost every 8 hours for 30 mins. I would replace the timer just because it's a cheap part and easy to do. P# 215846602 . Other common problem is the defrost thermostat which is behind the freezer back panel on the inside by evap. P#297216600. It's a little harder to change.
No household units use ammonia as a coolant. IF it did and it leaked, you would know it immediately. If the unit still works, there is no issue with the Freon that is in it. The odor could be a sealant that was used to make the interior of unit. You did not say how old it is. Freon can have an odor to it but the unit would stop working correctly pretty fast.
First, I'm not a Frigidaire representative.
*Check your warranty. You should call vendor for service.
* Note; Check as refrigerators usually have long warranty.
*** The following is for information only.**
* First check if the water faucet (valve) is turned on.
* first check if you have water from the water dispencer. No? then there is a clog. (note; older GE fridge) ; https://www.youtube.com/watch?v=cjShdHoiiJw
* He suggest checking filter then the water solenoid. (requires getting into the guts of box. (may void warranty.)
* Check if the filter is seated and locked. https://www.youtube.com/watch?v=9x4Q_k9czzU
* Change filter (if stuck); https://www.youtube.com/watch?v=yeWmjDO-kZI
* Water okay? Then check Ice maker; Perform "Harvest Test"; https://www.youtube.com/watch?v=LQQHNHHM4QE
* Not "Harvesting"? (not running) ; https://www.youtube.com/watch?v=LQQHNHHM4QE
* Another "Replacement" of ice maker; https://www.youtube.com/watch?v=v0kh3RVcNZo
* Good example of "freeze up"; https://www.youtube.com/watch?v=KsV-Zno92Fk
*** For older models:
* I've had this problem a lot with my old fridge. Water line works but no ice.
* Check if the "Ice Full" leaver is in the down (no ice) position. Some ice makers will lock the leaver (a stiff wire) in the full position to manually shut off ice maker. Make sure it swings up and down when ice tray is empty.
* Sometimes when the tray is left full of ice for a week or more then the tube feeding water will freeze up. Defrosting the freezer on a regular basis will help. A quick fix is to pour warm water in the ice maker section (where the ice is formed). This will help melt the clogged pipe and also make some ice while your waiting. You may have to do this several times. But at least you have ice.
* This (freezing up) may also be caused by the freezer set too cold. The temperature dial should be in the middle. But turning it colder and colder over time will cause ice to build up and prevent foods from freezing properly (thus turning the dial down colder.) Once your maxed out on the dial. You will find the freezer gets warm and things get covered in frost crystals.
* Transfer food to another refrigerator and perform a complete defrost by leaving it unplugged and the door open (freezer section).
* Frequently check and dump water at bottom of fridge. Clean the dust on coils while down there.
* A fan blowing into the freezer section helps. (Do NOT use a heated fan as it will warp the plastic and over pressure the refrigerate.)
* Once defrosted (+4 hours). Power up the freezer and set the temperature dial to mid point and the freezer diverter to middle or normal setting. Don't put the food back in yet. Wait till the freezer gets down to normal freeze temp (about 0 to 10F)
* Move freezer back in place (if you moved it to access plug) then slowly put back the food. Try not to cram stuff in. Leave space for air to flow freely around items.
* Final, Call for service anyway and have them perform yearly service. Check your warranty.