Furnace surrounded by a condo put somebody through the mill? I have a kenmore purchased from sear last year. i changed the...

I have a kenmore purchased from sear last year. i changed the filter today wheni notice the condo wasn't heating, on auto, as of slowly ,due to so much great lakes winter temps. i notice the intake fan works fine but the output to my room vent is very shaky or not at all, even though i hear the follower. i never checked the pilot until today. i tgoes on , then i don't see it, but the disciple intake fan still go. and i see a little green wishy-washy on the bottom of the furnace go on 7 times, sour, then 7 again. we never have the ducts cleaned. not sure if that s the prob. do i need to appointment a tech, or is it a simple solution.
Answers:    just guessing here, but if it is a Honeywell printed circuit, the 7 blinks usually indicate that the section is not sensing the pilot, and then it is turning adjectives gas, including the pilot off. Turning the power sour may reset the unit, sometimes for one steam cycle, and sometimes until the power is interrupted again. If this doesn't help, bid a tech. Too many things that can dance wrong to be guessing. These controls are supposed to fail on the "safe" side, gist that they will fail to sense a flame, and shut stale the gas, instead of failing to sense that the flame is out and leaving the gas on.
you know like exact thing happen to me once. that was contained by my old apartment that exploded... because of a furnace anomaly.
sucks for you