Ouch, no smoke...
...mold formed in one day...doesn't seem right. Did it turn a white/grey color all over? Maybe there's a lot of spores in the air in your location right now, but that's never happened to me around here. I guess it is a possibility with having under 120* chamber temp for such a long period of time, along with no smoke for surface preservation of the meat...I know smoke has anti-bacterial properties, but I'm not 100% sure about it's ability to inhibit mold growth. My longest jerky smoke and drying (pepper-steak jerky, if I recall) was probably 16-17 hours...started low around 120*, slowly bumping it up, and it was finished @ 160* chamber temp for the last few hours.
Anyway, cure additives don't retard mold growth...it just kills bacteria before the meat is smoked and dried, or cooked. If properly dried and stored, jerky can be kept for quite a while before mold will form on it. The commercially processed jerky has chemical additives to retard mold growth in specific...that's why when it's left closed with the original processing seal on the package intact, it seems to have an eternal shelf-life. Mold is what will destroy your jerky.
Keep trying and don't throw in the towel. The
AMNPS does have some niches...it doesn't like high humidity or the pellets won't continue to smolder, but there are ways to correct that. Also, be sure you have good air flow to feed the pellets...in the MES, many folks slide the chip loader open part-way to allow air in for the pellets,
Check
HERE in the smoking gadgets section for threads on issues and fixes with the
AMNPS. There are some pretty good tricks that have been shared there. I have a small
AMNPS, and a prototype
AMNTS that Todd sent me back in the day for testing. The pellets can be finicky if conditions are less than favorable. If you remember nothing else about the
AMNPS, do remember these three things: high temps will cause the pellets to burn rapidly: and low air flow or low oxygen (from the combustion of a solid fuel or propane fire) to the AMNPS and or high humidity will kill the pellets (high moisture content in the pellets makes for frustration when lighting, as well...nuke (microwave) the pellets to dry them if you have to). The environment your pellets are stored in does matter. Lastly, be sure your smoke source is functioning properly before you leave it unattended for any long period of time.
Man, wish you could have tasted this jerky...it will be worth a second try once you get the AMNPS to smoke for you in your MES.
Stay with it!!!
Eric