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Old 02-24-2009, 09:25 AM   #1
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Need Suggestions for Furnace Blower Assembly


My furnace works, its just that when the blower starts and stops it occasionally disrupts my audio amplifier.

I have installed new breakers, and done re-wiring in the breaker box (which helped because the washer and dryer used to cause the amp problem too and now they don't).

Still, no matter what I have done in that breaker box, the furnace still causes the amp hiccup (I even tried a DIFFERENT amp!).

So there is obviously something happening electrically when that thing kicks on.

Now, I have never done any work at all with furnaces, so I am kinda in the dark as to what to do now.

Are there blower assemblies that exist that start up slower (thereby using less energy when they start and stop)?

Are there tweaks that I should do to my current blower?

Any suggestions or tips would be great!

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Old 02-24-2009, 02:41 PM   #2
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Need Suggestions for Furnace Blower Assembly


Quote:
Originally Posted by LordX View Post
My furnace works, its just that when the blower starts and stops it occasionally disrupts my audio amplifier.

I have installed new breakers, and done re-wiring in the breaker box (which helped because the washer and dryer used to cause the amp problem too and now they don't).

Still, no matter what I have done in that breaker box, the furnace still causes the amp hiccup (I even tried a DIFFERENT amp!).

So there is obviously something happening electrically when that thing kicks on.

Now, I have never done any work at all with furnaces, so I am kinda in the dark as to what to do now.

Are there blower assemblies that exist that start up slower (thereby using less energy when they start and stop)?

Are there tweaks that I should do to my current blower?

Any suggestions or tips would be great!

A small electronic capacitor wired from the motor frame to furnace frame will "ground" the induced field causing your problem

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Old 02-24-2009, 03:59 PM   #3
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Need Suggestions for Furnace Blower Assembly


What kind of $$$ are we talking about? And skill needed to perform that?

Also, where would I look for this capacitor?
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Old 02-24-2009, 04:03 PM   #4
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Need Suggestions for Furnace Blower Assembly


Radio Shack for the capacitor....if you are not familiar with the pulling of a furnace motor I would suggest a Pro be called in.
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Old 02-24-2009, 04:04 PM   #5
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What kind of capacitor?

If I went in to radio shack, what would I ask for?
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Old 02-24-2009, 04:07 PM   #6
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Need Suggestions for Furnace Blower Assembly


50k micro farad to 100k micro farad.
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Old 02-24-2009, 04:14 PM   #7
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First - Thanks for your suggestions.

I wish I knew more about furnaces and how to service them.

So wiring this capacitor anywhere on the motor frame, to anywhere on the furnace frame should be enough to solve this odd issue?

What do you think is causing the problem?
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Old 02-24-2009, 04:42 PM   #8
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I don't have enough time to explain motor theory.
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Old 02-25-2009, 06:48 PM   #9
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Someone suggested getting an Isolation Transformer for the audio system. That it would block whatever noise is coming from the furnace.

What do you think of that suggestion?
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Old 02-25-2009, 07:01 PM   #10
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if you don't wish to take my advice to heart please don't ask me questions that second guess what i have already advised you to do.
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Old 02-25-2009, 07:06 PM   #11
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If you want to invest some good $$ buy yourself a clean power supply. I am looking into a Furman unit for my high end stereo. They are not cheap but do some amazing improvements to the sound. My favorite supplier:
http://www.creativeaudio.ca/audio/power.html

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