Here's one for all the furnace/electrician experts out there.
My mid-efficiency furnace has a fan that is too loud for me.
Currently there are only two settings for the fan: On or Off.
I'd like to know if I (or someone else) can add a lower fan speed
setting to the furnace fan OR failing that, have the fan changed for
one that allows different settings (high, med. low for example).
I know a computer and a furnace are completely different animals, but I
got to thinking about this when I learned you could control the fan
speed of your computer/CPU/case fans with software.
Having a pro check it out would be a good idea. Running a fan too slow
can cause problems. Without knowing a lot more I would not be able to tell
you if it would be good for your specific furnace. ("Knowing a lot more"
refers to both more about your furnace and my personal need to know more.)
Well I can't add much more so you won't "know a lot more" but here's a
bit more info.
I just checked downstairs and it's a Lennox 'Whisper Heat'
mid-efficiency furnace installed in 1998.
I haven't had a lot of luck with it so far.
In Jan '03 the ignition module fried itself and needed a replacement.
Then in Mar '04 the BCC board fried itself and needed a replacement.
Fortunately they were still covered under warranty.
On 20 Jan 2007 16:20:34 -0800, email@example.com wrote:
The seller of my house kept just about all the manuals** including the
furnace manual, and it showed, or maybe it is the wiring diagram
inside the removable furnace cover that showed, that the fan motor has
4 (or 3) taps.
I too thought the fan was too noisy, and wanted to run it slower.
Unfortunately, the diagram showed the default fan tap as the slowest
one, and when I got in there, I saw that that was indeed the tap in
As a last hope, I tried the other taps anyway, but indeed they ran the
fan faster. Now I shut the door to my bedroom sometimes so I don't
have to listen to it. There's room under and around the door for air
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