I installed four new burners in a Carrier condensing gas furnace model# 58MXA080-F-1-12, that has been converted to PROPANE . The old burner's ends were collapsed. The furnace is from 2001. After installing them, and making sure they are aligned, I am getting a backfire when the furnace lights. I have checked to make sure that the manifold pressure is good (10" wc), and double checked the alignment. The furnace uses an igniter.
The furnace at times will light off smoothly with no issue. But for every smooth light off, there are four to five mini explosions when the furnace lights off. I have worked on these furnaces before, and know that they are prone to leak in the secondary heat exchanger, but with this one I see no evidence of water like it has been leaking. It just will not light off properly. Any assistance will be much appreciated. Thanks to all
The furnace at times will light off smoothly with no issue. But for every smooth light off, there are four to five mini explosions when the furnace lights off. I have worked on these furnaces before, and know that they are prone to leak in the secondary heat exchanger, but with this one I see no evidence of water like it has been leaking. It just will not light off properly. Any assistance will be much appreciated. Thanks to all