Burner won't fire on Payne 490AAV furnace
The furnace you are working with is a good furnace, this particular furnace is equivalent to the Carrier 58 MXA. What is the serial # on the furnace. When you are removin the cap is the one below the burner box or is it the one on the inducer? The other thing I need to know to help you is the product #. I also need to know what size of pvc pipe is on this unit, how many 90 deg and 45 deg elbows. If unit is only a couple of years old they may have not followed the venting guide. If you will let me know, I will help you fix this.