On most furnaces a solid light means normal no call for heat. In laymans terms it is not receiving the signal from the thermostat to turn the heat on. This could be a bad t-stat, bad wire coming from the t-stat., or even a clogged drain line could do this(you say high efficiency so most likely a 90+furnace). You can check for a clogged line easily. If there is a pan under the furnace there should be a float switch in that pan. If the pan is full of water you have a clog in the pvc drain line coming out of the furnace. you could also have a condensate pump mounted next to or near the furnace to pump water out. You can pour water in this to ensure it is actually pumping.

In general a newer furnace will have several lights, if you have a green light that’s steadily lit, then as far as the furnace control board is concerned everything is just like it should be, it has no internal faults. If it’s a different color lit, it can mean other things. Usually on the inside of the panel you removed to access there should be a sticker that will tell you exactly what the lights are indicating.

Inside your furnace cover there should be a diagram and the light codes – each blink sequence is a sort of morse code for a different problem. Check on the Bryant site or search for more sites like this by typing “Bryant furnace troubleshooting” or some such term.

http://www.ehow.com/about_5978756_bryant-furnace-p…

Wait – just found this one and you aint gonna like it:

http://www.homeownershub.com/maintenance/List-of-B…

Dealer cost on our circuit board was $98 – different brand

Funny, I was wondering the same thing myself

On most furnaces a solid light means normal no call for heat. In laymans terms it is not receiving the signal from the thermostat to turn the heat on. This could be a bad t-stat, bad wire coming from the t-stat., or even a clogged drain line could do this(you say high efficiency so most likely a 90+furnace). You can check for a clogged line easily. If there is a pan under the furnace there should be a float switch in that pan. If the pan is full of water you have a clog in the pvc drain line coming out of the furnace. you could also have a condensate pump mounted next to or near the furnace to pump water out. You can pour water in this to ensure it is actually pumping.

In general a newer furnace will have several lights, if you have a green light that’s steadily lit, then as far as the furnace control board is concerned everything is just like it should be, it has no internal faults. If it’s a different color lit, it can mean other things. Usually on the inside of the panel you removed to access there should be a sticker that will tell you exactly what the lights are indicating.

Inside your furnace cover there should be a diagram and the light codes – each blink sequence is a sort of morse code for a different problem. Check on the Bryant site or search for more sites like this by typing “Bryant furnace troubleshooting” or some such term.

http://www.ehow.com/about_5978756_bryant-furnace-p…

Wait – just found this one and you aint gonna like it:

http://www.homeownershub.com/maintenance/List-of-B…

Dealer cost on our circuit board was $98 – different brand

Funny, I was wondering the same thing myself