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Makes noise at furnace start up

Post created: 2012-12-20 Type of Equipment: Furnace Views: 274

This question was created on the page: https://www.furnacecompare.com/furnaces/lennox/g26.html.

On 2012-12-21 JB wrote:

First, if you are not an experienced HVAC tech certified to work on these furnaces, don't. It can be dangerous and you'll make the problem worse.

For some good basic information you can go here and scroll down to point 2. You can also find a lot of information on furnace noise here: http://www.ductworkinstallation.com/NoiseReduction/FurnaceNoise/tabid/78/Default.aspx.

Without more information it is hard to say why the furnace is making a loud noise. For example, what kind of noise is it? Grinding, rattling, squeaking? Therefore, it could be moving parts rubbing against each other, sound of the ducts or other parts expanding as they receive heat, some sort of mechanical difficulty when igniting and the blower motor comes on, or simply normal operation.

Best thing to do is look for the LED error/fault code display, which will give you an indication of whether there is a problem and what it may be. Then call an HVAC tech.


To keep legal happy, let me just say that I am not an HVAC contractor, and you should never even look at your furnace without having a qualified, liability accepting HVAC contractor present.  To keep sales happy, let me just say that you can find an HVAC contractor that's happy to take your money here: http://www.furnacecompare.com/perl/find_contractors.pl.

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