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Fan capacitors dying

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I've got an 18inch hatari fan on my patio that has developed a weird habit of its speed slowing. After replacing the start capacitor, it becomes normal - for a while after which need to replace the capacitor and it runs good again for a while again. Rinse and repeat.

It does not stop, but aftwr some time just starts to run at lower speed (stable speed after start). And always starts normally. Set on highest speed (3).

Any idea what could cause such behaviour (other than bad quality capacitors)? I've replaced the capacitor 5 times now and it's kind of weird if they all would be bad so wonder if there is something else in the fan that could cause this.

I know you said not - But I've had batches of bad (cheapo) caps. It's actually a run capacitor so it's in circuit all the time.

Does the motor run hot? Could be a shorted winding, no DIY fix.

Are the bearings good and free?

"I don't want to know why you can't. I want to know how you can!"

May not be related, but my pool pump capacitor failed repeatedly and what fixed it was a loose neutral reterminated.

  • Author
9 minutes ago, Crossy said:

I know you said not - But I've had batches of bad (cheapo) caps. It's actually a run capacitor so it's in circuit all the time.

Does the motor run hot? Could be a shorted winding, no DIY fix.

Are the bearings good and free?

Bearings are good, actually replaced noisy bearing some time ago

Runs cool when normal speed after replacing capacitor (just checked as replaced the cap yesterday again). However I recall noticing earlier when changing the cap that I felt it was hotter than it should have been. Assumed at the time that that was due to bad cap.

Guess I should get new capacitors from different place to try the easy solution...

  • Author
12 minutes ago, carlyai said:

May not be related, but my pool pump capacitor failed repeatedly and what fixed it was a loose neutral reterminated.

Okay, need to check the cable. But it runs normally so I would assume connections are ok

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