Furnance has been sporatically messing up. Will work fine for a month, then screw a few times in one day, then be fine again for awhile. Light on the board flashes a code 42 for improper inducer fan speed whenever its messing up. Turn power off and on to the unit and it usually starts working... may take 1 time, may take 10. When its not working, it shuts down after the inducer fan is running for awhile; but before the ignitor starts glowing. Once its starts working, it may be great for a couple of weeks; or it may start acting up after 45 seconds.
Been searching to see what the problem could be (which is how I found this forum). One guy mentioned his problem resolving after opening up the inducer and cleaning all of the crud out; which he thought allowed it to better balance. Is this a realistic assumption? I do have some pretty nasty looking black stuff that came out of the collector box for the drain tubes when I flushed it. I'd imagine the inside of the inducer must have a lot of build up, too. $+ for a new inducer is going to make for some not so happy holidays