Maybe the fan is slowing down. I would consider changing fans. The bearings may be going or the brushes going bad. Less air flow in turn. Call Traeger, they are really helpful.
"Please let me be the person my dog thinks I am." ~Author Unknown
8 x 18 Haulmark Trailer
Fast Eddy FEC 100
Traeger Texas BBQ 075
UDS "Cool Hand Luke"
3 Weber Kettles and a Yellow Thermapen
KCBS Certified BBQ Judge #8425