First time snack sticks and thermo processing
When the machine failed to get to temperature, it was -6 degrees. It was outside in Bozeman Montana. The altitude here is 4800. I had ice from the machine to the concrete it was sitting on. I rent, and not able to put a hole through my garage for venting purposes.
The machine setting was on high for 36 hours, never reaching temperature. The machine was 2 weeks old at the time of this event.
I hope this helps.