Hi,
I've had my Honeywell HO-5500RE fan for about 2 years and out of the blue when I plug it in it automatically switched on (it never use to, you had to press the on button before it actually turned on) and none of the buttons are working.
I've tried taking it apart and can't see anything obvious.
Any suggestions?
Thanks
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Hi @ninko,
Post some close up images of the control board and the button board with your question. Others may spot something.
Here's how to do this on Ifixit iFixitでの質問に画像を追加する方法.
If it turned on without having to press the power button it may have been a faulty power button (short circuit contacts?) and now if the power button contacts have burnt out (open circuit) it can't turn on as the power can't be switched on.
If you have a DMM (digital multimeter) use its Ohmmeter function and with the power disconnected from the fan, check the operation of the power button with the meter to see if the contacts close and open electrically when the button is operated and released.
Just a theory but you've got to start somewhere.
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Hi @ninko,
Looking at the image I can't see anything that is obviously wrong with any of the components. Also is there another board where the power cord connects to? If so post some images of that. Looking at the board you posted the components don't seem the type to work at main household supply voltage value so I'm thinking that there may be a power board as well to regulate and provide the power required for the control board. But I may be wrong about this of course.
if this is the only board then I can't tell how many sets of contacts that the K1 On/Off switch has, 1 or 2 as I can only see the two leads on this side of the switch and I'm not sure if they're contact leads or just mounting lugs.
You need to remove the board and flip it over and see how many leads (connections) there are from the switch to the circuit tracks on the underside of the board and not just to pads for the mounting lugs to be soldered to. (maybe they aren't mounting lugs and the switch relies on the contact leads to be soldered to hold it securely in place)
Then you will have to place an Ohmmeter across the connections and check for either open circuit of short circuit when the switch is released and operated to know what happens when operating/releasing the switch.
There may be other readings because the switch is still "in circuit" so to speak so if you can't make out whether it is good or bad you may have to unsolder it from the board and then measure it "out of circuit", i.e measure directly across the switch leads with the switch removed from the board. Measure with the switch operated and also released
Make sure that you replace it the same way (mark a side somehow to remind you) in case it has two sets of contacts that may be different i.e. 1 make set and 1 break set for instance (makes (s/c) when operated or breaks (o/c) when operated s/c = short circuit o/c = open circuit.
Do all this with the power disconnected of course ;-)
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Hi @jayeff
I've added a picture of what I assume is the control board.
I do have a multimeter, but I'm not sure how to test the switches like you was saying?
Sorry, I'm new to this, but enjoy learning lol.
Thanks
Ninko さんによる
Could you tell me how did you get to the card? I would like to take it apart too, but I can't get there. Your suggestion would be very useful
Francesco Calamita さんによる