Double wall furnace fire balls.

brat77

My friend has a old cozy double wall furnace that she said there were fire balls coming out of it.

What could cause this to happen. I got down there with a jumper wire and started it dozen times. Once it kinda had a lil hesitation on second burner ignition. Could the air mixture adjustment plate on bottom of burner vertical tube be causing this?

retiredguy

Where do you see the fire balls. Are they inside the furnace, do they blow out of the heat exchanger, do the blow out of the chimney, where? Add pictures or a better explanation.

EBEBRATT-Ed

Burners are probably dirty or knocked out of alignment. I would also check gas pressure for starters.

mattmia2

or the vent was blocked with ice and it was rollout but delayed ignition of the second burner suggests dirt or cobwebs or rust blocking part of the burners @EBEBRATT-Ed suggested. if it has a blower also watch the flame when the blower starts, if the flame moves the heat exchanger is done

EdTheHeaterMan

Does your friend listen to Jerry Lee Lewis records?

Great Balls of Fire! (1989) ⭐ 6.3 | Biography, Drama, Music

guzzinerd

Saw that once after the local plumbers did their annual boiler "check". They had knocked one of the burners off the gas line