My Carrier furnace keeps kicking on and then off in 10 second intervals but is NOT maintaining the thermostat's temp. The Thermostat is brand new. There are 2 furnaces in the house, same make of furnace, different thermostats and BOTH thermostats are way below their temps. The furnaces worked fine a day or two ago and nothing has changed, as far as I am aware.

Are you seeing any flashing lights in the area pictured? You may need to reinstall the door and look through a peep hole.

Its normole just be care full

No this is not normal. Since the op has not been back I am assuming the issue has been resolved