Range hood fan quit working but started working again
Yes, cold weather and hardened, cold grease buildup can conspire to stop your fan from starting.
That's &quot;the answer to the question you asked.&quot;
The fact that you have enough grease buildup to keep the fan from starting when it's cold means that it needs to be cleaned, and possibly lubricated. That can be a DIY job, or a different, specialized contractor (most restaurants are required to have their hoods cleaned several times a year by a specialist contractor in hood-cleaning.)
It's almost certainly NOT the &quot;fan motor replacement contractor's&quot; job, unless they are more of a generalized hood-vent service contractor. Even if the one company does it, it would likely be two different workers with jobs that intersect but don't overlap.