furnace flare ups..
I have a suburban brand furnace. It worked fine all last winter but in the spring I had to replace the control board. Now it fires up fine, but sometimes I get this loud PUFF. and it blows out t...
Forum Discussion
groundhogy wrote:
Doug, How does one get inside the firebox?
I have the NT-30SP
You remove the furnace, take the side plenum fan blade covers off. You then remove the glass access plate and THAT will allow the burner to pull out. You then turn the furnace casing over and over while blowing compressed air thru either the burner access or exhaust to remove all the rust and sediment build up. You also remove the steel gas inlet with the orifice from the rear. That opens up all the holes in the casing to blow things out. Inspect the casing. If you find rust thru or corrosion thru, throw away the furnace and buy a new one. Not worth repairing a 25 year old furnace. Doug
