Coleman Evcon Furnace DGAT090BDD Furnace kicks on blower stays on when you check there is no heat coming through the vents. Look at the furnace and the green indicator light is blinking 4 times. Have woke up every day this week with the tempature in my house 58 degrees. What is wrong??

The code for the blinking lights should be on top or bottom of the control cover. Also check back of the furnace door.