Question:

Furnace makes a horrendous noise?

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My furnace makes this rattling/screeching/vibrating noise. It is coming from the little gray box that has the reset button on top of it. I took the cover off, and there is this small rectangular piece that seems to be causing the noise or the noise is coming close from that point. I will call for service, but I really like to know ahead of time what the service guy might tell me or what it might cost. Thanks in advance for the great help out there!

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Report (0) (0) | earlier
I am guessing it is an oil furnace and the grey box is the burner relay.

The noise could be from a loose connection in the wiring or just a defective control.

$70-$120.00 for the control.
Report (0) (0) | earlier
I'm guessing this is an oil furnace and the noise is probably a relay or the transformer. You usually have to replace the entire box as individual replacement parts are usually not available.
Report (0) (0) | earlier
1. my guess is it may be a faulty built-in alarm which is not totally spoilt but is still working.

2. It could also be a magnetic contactor going faulty. The mechanism doesn't close properly and is causing all this rattling and vibrating noise.
Report (0) (0) | earlier
get a quiter one
Report (0) (0) | earlier
Low voltage supplied to the primary control ( that's the name of the box ) will cause it to make a hellacious chattering sound . The voltage should be 120+-10%.
Report (0) (0) | earlier
it sounds like something is either about to break loose or has already broken loose.I was told a little vibrating is normal. call the repair man and do your best to tell him what the problem is . if you have the same luck as me when he gets there it will run smoothly no noise at all LOL.and the minuter he back's out of your driveway it will start all over again. LOL
Report (0) (0) | earlier
Thats strange. I mean a reset box like that shouldnt be making any noise, even if something is loose inside of it.

Could it be possible that something else is rattling and the sound is traveling to that area-kind of fooling you where it is coming from?

Is the sound constant-or do you only notice it when the blower kicks in? If its a sound that loud it seems like it could be the blower fan rattling.

But really its so hard to say without looking at it.
Report (0) (0) | earlier