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Your right! I was able to get the second panel off and there was a chart on the back.
Slow blinking - Normal, no call for heat.
Fast blinking - Normal, call for heat.
etc...
etc..

I feel a...

Yes, it appears to be. I took off the cover and it appears to be quite clean. Of course, the electronic air cleaner was quite dirty, so I replaced the filter media.

The red blinking light just...

My Trane XB90 Gas furnace has a red flashing led light. Is this a problem? What does it mean?
Thanks in advance...