Is Your Fan Not Working Due to a Faulty Capacitor?

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Discussion Overview

The discussion revolves around the malfunction of a fan, specifically addressing potential causes for its failure to operate, including mechanical issues and electrical components. The scope includes exploratory reasoning about the operation of single-phase induction motors and their starting mechanisms.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant describes a fan that produces a humming noise but does not operate, suggesting it may be stuck and could overheat due to worn bearings or internal shorts.
  • Another participant proposes that the capacitor could be the issue, noting that single-phase induction motors require a functioning capacitor to start.
  • A follow-up question asks whether manually spinning the fan would allow it to run, indicating a potential investigation into bearing issues.

Areas of Agreement / Disagreement

Participants express differing views on the cause of the fan's malfunction, with some focusing on mechanical issues while others emphasize the role of the capacitor. The discussion remains unresolved regarding the exact cause.

Contextual Notes

There are assumptions about the condition of the fan's bearings and the functionality of the capacitor, which are not fully explored. The discussion does not clarify the specific symptoms of the humming noise in relation to the proposed causes.

muh_j18
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my fan has stopped working recently, when i turn it on it makes hamming voice, but it doen't work, what might be the problem?
 
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muh_j18 said:
my fan has stopped working recently, when i turn it on it makes hamming voice, but it doen't work, what might be the problem?

Don't leave it on and humming like that. It is stuck, and could overheat. It may be stuck because of worn out bearings, or because there are internal shorts in the windings that are reducing the overall torque, or both.

Time to replace the fan, I'm afraid.
 
could the problem be the capacitor?
single phase induction motors are not self starting, so if the capacitor is not working, the motor won't start running, am i wrong?
 
muh_j18 said:
could the problem be the capacitor?
single phase induction motors are not self starting, so if the capacitor is not working, the motor won't start running, am i wrong?

Interesting. Does the fan run if you start it by spinning it by hand? Do the fan blades seem to spin smoothly (no bearing problems)?
 

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