Furnace flame ignites, blower engages and then the flame goes out. Pilot light stays on and blower stays on for about 10 minutes blowing cold air out. Thermostat was replaced by apartment repairman, still happening. Model: Armstrong 38HWC182-2 S/N: A10749FNA.

Thanks.

You should have a flashing fault light on the control board to let you know what is wrong. If this is a rental property you may want to have them come back and take a look at it. If you work on it and its not yours you could be liable for damages.