Fan vibration, noisy fan

Clean grease off the fan blades, remove the fan motor and re-secure it. Make sure there are no blades missing from the fan. Lubricate the fan shaft. Make sure any guard on the fan is not fouling and make sure the guard is properly secured. Vibration is what is likely causing the noise.

Or just replace the fan parts.

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Hi, have you tried moving it to somewhere else as it can be noisy depending on what type of surface its on, as this can cause it to vibrate

Check all housings for proper installation and tightened. A slightly loose one will cause a buzz.

You may want to remove cover on roof and inspect for mudwasp nests on shafts, fan blades, blower wheel etc. Quite common for that to happen and cause vibration. The nests throws off the balance.

If its a loud "whirring" noise almost grindy...you need to replace that fan...it's about to fail. if it's a vibration type of noise, you should try tightening the screws first...if it's coming from processor fan, replace it before you fry your processor...

With the engine cold, check the fan blade assembly for cracks. Some blade assemblies have a large ring or band around the outside of the blade tips. If it is broken the fan becomes off-balance while spinning and will vibrate badly. Fan replacement will likely need to be done to cure this problem.

the fan may be loose on its drive shaft and catching the housing

yes, go to Zalman.com and get a cooler if you mobo is out of warranty.

could be trash leaves acorns ect in housing that the blower is picking up then dropping when the unit is off. try cleaning the housing the motor fits into

A noisy humidifier may be the result of an unlubricated fan motor or a drive mechanism clogged by debris. Periodically clean the water reservoir, fan, and nozzle to ensure that they are clean and working properly. To keep your humidifier working smoothly and efficiently, lubricate the fan motor bearings with SAE #20 oil. Be sure to consult your owner?s manual for proper care and maintenance procedures. If it seems loose, vibrating parts are causing the noise: 1) Disconnect the power. 2) Remove the cover and look for any vibrating parts. Tighten screws, if necessary. 3) Wiggle the fan to see if it is loose on its shaft. If it is, tighten the mounting fasteners. Lubricate the motor's bearings if suggested in your owner's manual. 4) If it still makes noise, call an appliance repairperson or take the unit into an appliance repair shop.