BEST WAY TO CLEAN A LASKO MODEL 4900 FAN - Lasko 4900 Portable Fan

A tower fan should not be opened at all. (It’s unsafe to do so, and may damage your fan.) Every two to three weeks, simply use the brush attachment of your vacuum cleaner on the tower fan intake grills to remove lint and dirt, or use a can of compressed air to blow off dust from inner fan blades. That’s it! Your clean tower fan is ready to be plugged back in and get back to keeping your home breezy.

Source:
https://www.lasko.com/periodic-cleaning-keeps-electric-fans-operating-at-their-best/

There are screws hidden between the slats on the side of the fan that are not obvious. You will also need to pry the fan apart as it snaps together. On the back by the power cord is a round tab over it. There are some screws under it. They hold the motor to the back assembly. It took about 7 minutes for us to get it apart today because of the screws being hidden on the sides. After a cleaning it won't turn on now.

Alice, Check the attached Lasko Fan video links,instruction and guides, Good luck
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when a fan makes noise while turning,means the bearing is,
starting worn out.best to replace it.when its not turning,its allreddy,
overheated.

yes, there are screws on the side that you have to remove first. you have to remove the screws for the handle on the outside of the fan case, but the rest of the screws are on the inside of the fan case. you will have to move the fan so you can get to the screw that is hiding. you will want to take the side off that does not have the power switch on it. I also like to use an air compressor to blow the fan out as well. this works just as good.

i would say that the capacitor is shot.

well take the cover off and take the oscilater which the long thing that gives u air out and take a soft brush to it

Do you have the still have the e20739 lasko fan, i need the plastic blade on the unit

First make sure heater is unplugged. Next, on the side of the heater locate two holes (see image) these are what's keeping everything in front together. unscrewing these and genty pulling sides out lwill release the top filter and front where control knob is and bottom filter where the heated air comes out. Clean filter & re assemble.

you need to dismantle the fan,
the top back pry off.
then you will see screws.