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Your Question: "i have a coleman furnace model dgat056bdd i have replaced the ignitor and the sensor rod the combustion blower is ok the centrifugal is ok and the blower is ok too but this is what it is doing for heat it turns on the combustion blower turns on for about 30 sec. then the ignitor turns on for about 15 sec. then the gas turn on it burns for about 60 sec. then the blower turn on but when it does the gas turns off now the blower stays on the combustion blower stays on to after about two min. the gas turns back on for about 60 sec. and turns off it will do this 4 to 5 times then the furnaces turns off but the control board light is only blinking one time . now if i turn it off then it will run again just like it did before if anyone knows what is wrong i would be very thankfull for your help"

Model dgat056bdd if you have a coleman evcon furnace I had mine go out well it was the sensor probe it right by the flame well it would light for about 60 sec. then go out it would do this about 4 to 5 times then this light would blink one time in which it means "ignition failure" well what I found out is that the sensor probe looked the same but the thickness of the metal has to be the same to you see the sensor probe is verey verey sensitive so I moved it closer into the flame also I learned that on the control board right near the little lite that you will see two little black square if you look close there is tempture setting that you can adjust . Just by pulling up on them and moving it to your tempture don't for get to use a owm meter to make sure you don't have any broke wires if you use a owm meter turn the power off!! My furnace is working good now