LP Furnace flame flutters off and on and doesn't always light

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Old 02-09-19, 04:49 AM
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LP Furnace flame flutters off and on and doesn't always light

https://youtu.be/h31cvhVHQ1E

https://youtu.be/yy9vCIG04rc
90% effec furnace just replaced rusted out inshots It is usually the middle 2 that flutter, never seen the outside ones do it.
 
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Old 02-09-19, 04:59 AM
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The furnace should have a combustion air control per burner tube. Try adjusting the middle ones to eliminate yellow/orange tips on the flame. They should be blue.
 
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Old 02-09-19, 06:05 AM
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There are no adjustments That would be too easy lol
 
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Old 02-09-19, 06:08 AM
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I just had the furnace serviced with the old inshots. Without taking a micrometer to measure the new burners with the old, they compared side by side to be equivalent
 
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Old 02-09-19, 06:19 AM
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old inshots



New ones in furnace may have to remove burner box again and take pic of them
 
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Old 02-09-19, 07:37 AM
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What is gas pressure?
The nozzles could be clogged as well.
 
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Old 02-09-19, 10:20 AM
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That's not an air or burner issue.

It's either low propane pressure or more likely clogged orifices. When you take the burner out..... there is a little tiny hole where the propane enters the burner. Propane has more "junk" in the fuel and clog up orifices faster than with natural gas. I'd clean all of them.
 
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Old 02-09-19, 04:20 PM
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Thank you for the replies. It has been stupid cold the last week and I'm down to less than 20% in tan

Don't remember which one that one was. I wondered about gas pressure

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Last edited by PJmax; 02-09-19 at 06:04 PM. Reason: added pic from link
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Old 02-09-19, 06:03 PM
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With under 20% liquid you're not getting a whole lot of vaporization on a cold day.
I'm sure your pressure is low. Clean all of them while you're in there.
 
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