Lennox Gas Furnace Intermittent Fire Up Noise
#1
04-15-21, 06:59 AM
Lennox Gas Furnace Intermittent Fire Up Noise
I own 8 year old Lennox ML193UH natural gas furnace. About once every 4-5 days when the burner fires up it will roar, similar to a jet taking off, for about 3-4 seconds. After the roaring start it will work fine for the next several days and perhaps 60+ ignition sequences. There are no error codes being set.
The 'roar' is about twice as loud as the normal noise of the furnace normal firing noise but as I said only lasts a few seconds.
Any suggestions as to what is going on.
Thank you
The 'roar' is about twice as loud as the normal noise of the furnace normal firing noise but as I said only lasts a few seconds.
Any suggestions as to what is going on.
Thank you
#2
04-16-21, 09:14 AM
Group Moderator
Welcome to the forums.
Roaring is not common in a natural gas furnace. Normally you'd want to watch the furnace to see what the actual problem is. If it happens sporadically that can be difficult.
As a recommendation I'd have a tech remove and clean the actual burners and burner orifices.
If you don't have a service company.... check with your gas provider as they usual have good techs at very far rates.
Roaring is not common in a natural gas furnace. Normally you'd want to watch the furnace to see what the actual problem is. If it happens sporadically that can be difficult.
As a recommendation I'd have a tech remove and clean the actual burners and burner orifices.
If you don't have a service company.... check with your gas provider as they usual have good techs at very far rates.
Hud64
voted this post useful.
#4
04-17-21, 07:55 AM
Finally got the chance to hear the noise close up. A good description might be similar to the noise you hear when you blow over the top of an empty soda bottle. Louder and a little more raspy, only for a few seconds at fire ignition, then burn sounds normal.
#5
04-17-21, 08:12 AM
Group Moderator
That has to be something directly related to the burner.
You actually need to watch the flame(s) to see what's happening.
You actually need to watch the flame(s) to see what's happening.
Hud64
voted this post useful.
#6
04-23-21, 06:00 AM
Pjmax - Spot on diagnosis. Replaced burner assembly and the noise is gone. The old burner was dirty and had some minor rust. perhaps could have been cleaned up but I am happy that I replaced the part.
Thanks again.
Thanks again.
#7
04-23-21, 09:52 AM
Group Moderator
It's not uncommon for them to have rust in them.
A professional cleaning addresses cleaning the burner completely.
A professional cleaning addresses cleaning the burner completely.
