RE: Causes of Gas Furnace Burners to Sputter

What would cause the burners to sputter? It’s a 90% furnace and the burners only sputter with the door on. When the door is off, the furnace runs like normal. 

csp02 Rookie Asked on October 22, 2018 in Residential HVAC.
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2 Answers

Sounds like a possible venting issue/intake issue. Maybe total developed length is out of spec??

I’d personally check everything from heat exchanger integrity to static and dynamic gas pressure.

Find what’s right and it will lead you to what’s wrong 😊

Rookie Answered on October 29, 2018.
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