My furnace has been short cycling.

Bryant upflow forced air furnace
Series SB C
Model 100 393J

It will run for approximately 10 to 15 seconds, shut off for approximately 1 minute, run for 10 to 15 seconds, shut off for approximately 1 minute. It does this for around 7 to 9 times then will not cycle for another 30 minutes.

Could you please help me!