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Old 08-06-2009, 12:29 PM   #1
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Humm from box (transformer?) on wall near thermostat


Hello!

In my closet there is a small box with a small wire coming out of it. The wire seems to go (through the wall) to the thermostat.

The problem is that this small box humms. Sometimes loud, sometimes not. If I grab the box it stops humming; so I think it is vibration based noise.

How can I stop this!!!!!

HELP!

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Old 08-06-2009, 12:45 PM   #2
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Humm from box (transformer?) on wall near thermostat


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a small box with a small wire coming out of it
to the thermostat.
small box humms.
If I grab the box it stops humming
First, tighten all bolts you see.

Since the factory varnish treatment doesn't always work, take off the case, submerge the transformer windings in varnish and let it dry. This stops the loose winding turns from hitting other winding turns at 120 or 60 times per second.
Some forum members report success with this method.
If a new transformer is $10 then you will be paying yourself $1/hr if you DIY.

If you copy the specs from the 'former case we can probably find a source for a cheap new one.
It'll say things like 24 vac, 20VA, 120vac, 50/60 Hz.
HVAC places will overcharge for an electrically equivalent transformer.

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Old 08-06-2009, 12:53 PM   #3
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Humm from box (transformer?) on wall near thermostat


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First, tighten all bolts you see.

Since the factory varnish treatment doesn't always work, some forum members report success by taking off the case, submerging the transformer windings in varnish and letting it dry. This stops the loose winding turns from hitting other winding turns.
Which forum members. I did not know any had varnish tanks in their basements or garages. Are they doing Vacuum Pressure Impregnation too?

OP.....Just replace it. Or get ear plugs. It's normal.
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Old 08-06-2009, 02:36 PM   #4
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Humm from box (transformer?) on wall near thermostat


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Which forum members[?].
I thought it was that Leah lawyer lady, but I can't find it right now. Mighta' been a different forum. . .?

If the http://en.wikipedia.org/wiki/Burden_of_proof is on me then I plead http://en.wikipedia.org/wiki/Nolo_contendere

You sure are persistent, Mr. V.

Last edited by Yoyizit; 08-06-2009 at 02:39 PM.
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Old 08-06-2009, 03:10 PM   #5
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Humm from box (transformer?) on wall near thermostat


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How can I stop this!!!!!
Teach it the words?
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What we've got here is... failure to communicate. Some men you just can't reach. So you get what we had here last week, which is the way he wants it... well, he gets it.
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Old 08-06-2009, 03:17 PM   #6
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Humm from box (transformer?) on wall near thermostat


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Teach it the words?
You are good!
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Old 08-06-2009, 03:22 PM   #7
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Humm from box (transformer?) on wall near thermostat


No, just corny
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What we've got here is... failure to communicate. Some men you just can't reach. So you get what we had here last week, which is the way he wants it... well, he gets it.
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Old 08-06-2009, 04:14 PM   #8
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Humm from box (transformer?) on wall near thermostat


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You sure are persistent, Mr. V.
You know I mean no disrespect. I thought we would understand each other by now.......John. Varnish Tank
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Old 08-06-2009, 05:17 PM   #9
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Humm from box (transformer?) on wall near thermostat


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You know I mean no disrespect. I thought we would understand each other by now.......John. Varnish Tank
I understand more about Sultini than you. That may be the good news or it may be the bad news.

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