I've checked the spec and noticed it includes:-
Ambient operating temperature -30 to +60° C (-22 to +140° F)
Just a thought if your WAP is subjected to low temperatures in winter.
When I was running tests in climatic chambers down to -51°C/-60°F, if the equipment under test was powered off, it was normal to see hoar frost forming on the printed circuit boards, as moisture vapour in the chamber turned into ice.
When raising the chamber temperature back to room ambient (21°C/70°F) we waited until the frost layer had disappeared and the resulting film of water evaporated, before powering on the equipment. Get it wrong and droplets of water can short out delicate components on the pcb.
If you keep the WAP powered on all the time, it's unlikely you'll suffer this problem, due to heat being dissipated by the semiconductors. It's for this reason I leave equipment powered off for a few hours, if it's been stored outside in car and there's snow or frost on the ground. I let things like hard disks warm up first.