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I have a tower fan which initially runs on low speed and after 20-30 min the speed becomes normal. What could be the reason and how to fix the issue?
@ sachin gupta What is the make and model number of the fan as you have selected a desktop fan as the device and not a “tower fan”? If the fan is no longer under warranty, you may have to open the fan and access the control board where the speed buttons are connected to and check the components. Usually with speed controls for fans, the switches connect or disconnect capacitors into the fan’s motor circuit to increase / decrease the amount of current flowing to the motor so that it runs faster or slower. If you see any problems or if you’re not quite sure, post some images back here. Here’s how to do this Adding images to an existing question
sachin gupta besides the great suggestions given by @jayeff it is also possible that your fan motor is most likely starting to gum up. I suggest you tear it down right to the motor teh clean the rotor shaft bearing etc. with some contact cleaner/degreaser and some good puffs of compressed air. Dry everything off and apply some grease to the bearings etc. It is also possible that the motor windings are starting to fail.
