 Jim Grant's Tech Tips ‘99 Honda CRV, Vibrating A/C Fan Q: When the fan is on mid range and up on my '99 Honda CRV, the fan (I believe it is underneath the glove compartment) will start to make a vibrating sound. The higher the fan speed, the louder the sound. Any ideas on how to access the fan to see if it just needs some tightening up? If it is a quick fix, I would prefer to do it myself. A: I doubt that there is anything that needs tightening on your Honda’s fan. It'll be more likely that debris removal is in order. The most common cause for a fan vibrating at medium and upper speeds in our area is due to rodent entry. The little buggers will climb in from the air inlet duct and build themselves a nice little housing development in the cup of the blower cage (aka squirrel cage). It creates a safe place to have a meal and raise their family. The problem is you keep moving the vehicle and turning the blower motor on. Servicing the blower motor isn’t that difficult of a job and should be something that you should be able to do in an hour or less. May I suggest that while you're servicing the blower motor that you pick-up a new cabin air filter. If the blower motor has become a rodent den it’s likely that they used the cabin air filter as stuffing for their pillow. In the event that it is a rodent den in your blower you want to prepare your mind for what you might find. The blower motor in your vehicle is pretty powerful and in their sprint to escape, it can get messy. Just don't want you to blow your breakfast on the carpet of your Honda.
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