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Author Topic: Humming noise from control board Electric range  (Read 570 times)

Online scrapiron

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  • Member Since: Nov 2011
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Re: Humming noise from control board Electric range
« Reply #10 on: October 20, 2016, 12:06:42 PM »
Yeah, well, I also service electronics. :)

Offline myriam

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Re: Humming noise from control board Electric range
« Reply #11 on: October 25, 2016, 01:54:18 PM »
OK. Here we are: replacement capacitors received and installed.
Control board put in place and
 :(
No change... Humming noise still there.
Have to try something else...
Any suggestion?
Test to do? Measurement to do?


Online scrapiron

  • Technician
  • Member Since: Nov 2011
  • Posts: 271
  • Country: us
  • Service Tech Since 1974
Re: Humming noise from control board Electric range
« Reply #12 on: October 25, 2016, 02:25:54 PM »
I expect that the display board connects to a power/relay board. That is most likely where your problem is. I couldn't find a schematic or wiring diagram for your model. Would you like to post a picture of that?

Offline myriam

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Re: Humming noise from control board Electric range
« Reply #13 on: October 25, 2016, 02:52:07 PM »
Yes the display board is connected to a power/relay board. And everything look good on that.
Here are 2 pictures (not to good but enough for your eagle eyes!

Offline myriam

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Re: Humming noise from control board Electric range
« Reply #14 on: October 26, 2016, 06:08:35 AM »
Bad news....
This morning display show : Err F2
When I press on (X) (Cancel) clock show time again but few minutes later Err F2 again.

What mean "Err F2" ?

Online scrapiron

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  • Member Since: Nov 2011
  • Posts: 271
  • Country: us
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Re: Humming noise from control board Electric range
« Reply #15 on: October 26, 2016, 09:30:20 AM »
F2 normally indicates an over-temp problem. Usually the oven sensor or sometimes the control board. Most, but not all, sensors measure approx 1100 ohms at room temperature. I'm not certain about yours since I can't find any service info on it. At any rate, the power supply filter could be the cause of your noise. A failed power supply filter capacitor can cause the the control board to do odd things as well. Try replacing the power supply filter capacitors first.
« Last Edit: October 26, 2016, 09:38:12 AM by scrapiron »

Offline myriam

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Re: Humming noise from control board Electric range
« Reply #16 on: October 27, 2016, 07:41:35 AM »
OK.
I'll change them to. But I can't work on this for a few days.
I'll give you results after change made.
Thanks for your fast reply.

 :thanks:

Offline myriam

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  • Member Since: Oct 2016
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Re: Humming noise from control board Electric range
« Reply #17 on: November 02, 2016, 05:56:18 AM »
OK here we are: it works !
1- Check the oven temp sensor: 1100 ohms ! Good!
2- Numbering and remove 17 wires from the board
3- Dismount the board and visual check
4- Find new capacitors
5- Unsolder the 2 capacitors. Check with ohmmeter: the larger one give a bad answer !
6- Put new capacitors in place
7- Put board in place. Plug the oven.
8- Enjoy ! No more humming sound, everything works fine !

Thanks Scrapiron! You're a master! :thanks:

Online scrapiron

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  • Member Since: Nov 2011
  • Posts: 271
  • Country: us
  • Service Tech Since 1974
Re: Humming noise from control board Electric range
« Reply #18 on: November 03, 2016, 10:38:24 AM »
Glad to help.

 

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