My natural gas furnace has been on the fritz, and I'm having a heck of a time figuring out whats wrong with it. It wouldn't light, so I cleaned the heat sensor, and broke the hotwire igniter. I replaced the hotwire/heat sensor, and it will light the pilot no problem, and sometimes the burners will light, but it runs for no more than about 10 minutes (usually far less) then they go out. I have removed the filters to make sure it's not an airflow problem, to no avail. The best it has done was right after I blew dust out of the vacuum hose from the blower to the pressure switch, that was when it ran for about 10 minutes. I'm hoping someone here can help me, or at least give me some advice should I decide to replace it. I will most likely be installing myself, I'm pretty handy (6-7 years in other areas of construction, very little exp with HVAC), and my brother will come help me.
BTW, it is a Heil model NNE075B12A1