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...
I didn't mention the thermostat heat anticipator as the OP didn't say what year his Lance is and the model years and thermostat moldels used had varied over the years. Glad to see his has the adjustable anticipator and after the TC normalizes evenly inside and there's still short burn time, the anticipator adjustment (if there is one) is the next normal step to adjust for flame burn time.