What would cause a fan to not be covered by manufacturers warranty?
The photo to the right is of a fan that is full of bug larvae. This is not covered under the manufacturer’s. warranty. The bugs built up and threw off the weight of the bearing which caused the fan to fail before the warranty period of five years. These things came from under the slab in the basement. So, it is not a defect of the fan, but a bug problem under the slab. The slab could be treated around the perimeter and / or the fan taken off in the fall to make sure there is no more build up. If there is, a wire brush can be used to clean the fan fins. The only time any kind of maintenance would need to be done on a system is if there is a history of it. We do not know what kind of bug larvae causes this problem. The other time a fan would not be covered under warranty is if someone turns off or unplugs the fan and it sits for a month or two. The fan will become rusted inside and then may not work when turned on again. A fan turned off in the winter will lock up because moisture in the
