Furnace runs fine for hours then only blows cold air. The burners light, then go out after 2 seconds. After several attempts to light, the 2 flash starts & the blower keeps going. Only way to get it to stop is to turn off at the switch. After it is off overnight, in the morning it will start & operate normally for many hours, then the same problem.
Vents are not blocked, filter is clean, I increased the intake by about 60% this summer by adding duct & vents.
HVAC tech will not come out unless it is in error mode, but with night temps at 8 degrees, I'll freeze if I keep it blowing.
Any suggestions? Simple parts to replace?
American Standard Furnace, 4 years old, Freedom 80, Comfort R, 2 stage
Last edited by flocke; 12-09-2009 at 10:59 PM.