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Old 08-16-2018, 12:15 AM   #1
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Did the rheostat destroy the fan/light?


Hello, people,
There was a ceiling light in the bedroom, controlled by a wall rheostat (dimmer).
I replaced the Light with a ceiling Fan and Light combination, controlled by a remote control.
I Told her to leave the rheostat ALWAYS in the Top (on/bright) position.
The fan and light did work, for just a day or two. Now, it does nothing.
Could the problem be that the rheostat was accidentally lowered/dimmed?
Would that have destroyed/disabled the receiver for the fan/light remote control?
Thanks for any advice that you can offer.
Mark
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Old 08-16-2018, 02:20 AM   #2
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Re: Did the rheostat destroy the fan/light?


Just because you turned the dimer all the way up
does not mean it is safe to put wrong types of load on the dimer.
That dimer has to carry that load which it clearly did not like !
The hash alone would kill the dimer for sure.


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Old 08-16-2018, 07:06 AM   #3
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Re: Did the rheostat destroy the fan/light?


Standard dimmers are not rheostats, they're generally SCR's built from
semiconductors.
You may never know if turning down the dimmer was the cause of the
failure. What is known is that, 1) even in the full on position dimmers
can still chop a small part of the wave, and 2) the dimmer should
by-passed if it's at all important that it be left on.
Same idea with wires at breaker(s): leave wires OFF breakers until work
is completed. Do not trust h.o.'s not to turn them on....no matter what
they say!


https://en.wikipedia.org/wiki/Dimmer
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Old 08-16-2018, 10:07 AM   #4
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Re: Did the rheostat destroy the fan/light?


Replace the dimmer with a standard switch. Your fan may start operating again.
If not, the next weakest link is the remote receiver.
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Old 08-16-2018, 11:38 AM   #5
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Re: Did the rheostat destroy the fan/light?


Thanks very much for your replies.
Well, we did not really want any wall switch operating the fan/light, so I just
put a wire nut in place of that dimmer. There's now full power getting to the fan/light.
And none of the fan/light works.
I'm guessing that the receiver is dead. Is there a way to test that?
BTW, when the fan was working, it ran much slower than I would have expected.
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Old 08-16-2018, 11:54 AM   #6
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Re: Did the rheostat destroy the fan/light?


Bypass the receiver module and run power to fan motor directly and see what happens. Maybe just the controller module is bad and they can be purchased separately.
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Old 08-16-2018, 07:40 PM   #7
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Re: Did the rheostat destroy the fan/light?


The problem might have been you were using a dimmer designed for resistive loads (lighbulbs) on a motor and it has now fried things.
Also, a possible reason the fan ran slowly was that it was set to a lower speed. Most ceiling fans have a 'pull chain' speed switch (most commonly 3, with off) and the dimmer (or fan controller) will only adjust it within the range of the selected speed setting.
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Old 08-26-2018, 07:06 PM   #8
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Re: Did the rheostat destroy the fan/light?


Yup... you guys were right... the Receiver is seriously Fried.

I opened it up, to see if maybe there is a burnt Component that could be replaced.
Nope... the pc board is also nicely burnt.
Now to find a replacement... part # AA2009-9RF...
Easily available for only $1.50 each... IF I buy 1,000 of 'em, from China.
Haven't yet found a place that will sell just one of them. Ah, well...
Thanks for your time, people.
Mark.
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