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90 plus
Hi, I have a similar furnace (Bryant 90 Plus) from early to mid 90's. Not sure about the model #, but on mine if I pop off the cover, there are two round plugs about the size of a half dollar. Behind one of those is an LED that flashes with an error code. Look in your manual to see what the cause is.
I had a similar problem recently, where she acted like she was going to fire up, but then shut off. Turned out it has a sensor that checks the airflow. In my case (and I would guess in yours too) I had a dirty filter which restricted proper airflow. I didn't have a new one on hand, so I simply vacuumed the old one and put it back in. Ran it that way for about a month before finally replacing the filter.
Don't know if this will help you, but good luck!
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