I have a strong airflow from my registers, just alot cooler than it should be.

I just replaced my thermostat and still not alot of heat

I have a Coleman furance, model DGAA077BDTA the furnace is running and blower is running. Steady green light, and I have a flame. But not alot of heat. My thermostat is a Hunter Model 44100B. its reading 68 and I have it set for 80. New batteries are in it. I have it set to heat with the fan on auto...

I have a Coleman model number DGAA077BDTA I was woke up this morning freezing!! I checked the furnace and its telling me ignition failure. We bought this home on a bank repo and have no papers on the furnace. Can someone please help talk me though this?