Question about Cfm 802 Ecofan Table

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Why does a table fan slow down after some time?

I have a number of table fans/stand fans that either have slowed down greatly or don't seem to work at the slowest speed. One or two of these fans are just about a year old. Another looks almost brand new but stopped working altogether. I have been told that the most likely problem is a faulty capacitor. Is it true?

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Revolving blades in table fans pushes out air towards the front by creating a vacuum at the back of the induction motor. Other than providing air flow, the gush of air also cools the motor. Over time, esp if used in a polluted surrounding, dust collects inside the motor and causes friction in the shaft. If left for a prolonged period, this friction causes heat eventually drying up the lubrication, causing breakdown in the motor amature windings and also a leaky starting capacitor, thus slowing down rotation and also a complete failure.

2. Fans must be regularly taken apart, cleaned and lubricated. It is fairly easy if you are willing to learn. My India made Usha brand table fan is 48 years old and is still running smooth - just changed the start capacitor last year and my National ceiling fans are more than 35 years old.

3. In fact all moving parts in any equipment must be periodically taken apart, cleaned free of dust and grime and freshly lubricated. It will outrun your lifetime and serve the next few generations.

Best Regards,

Mahathev of Malaysia

Posted on Jan 10, 2011

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