It seems like the furnace cycles for too short of time ...can comes on then burner comes on for a minute or two then Shuts off and the fan continues to run for a minute mostly colder air....does get u...
The problem is the furnace burner is only running for 2 minutes, then shutting off.
This could be one of two problems:
1. A vent is blowing hot air right on the thermostat. 2. The burner is sensing that it is getting too hot, and shutting down to prevent a heat exchanger meltdown.
If your heat exchanger is caked with dust it can prevent the efficient transfer of heat to the air being blown through by the fan.