Yep, check the ducts. Our 232 has a short, tight turn to a wall vent in the bathroom. No problem during PDI, but second trip needed heat. Bathroom was chilly along with bedroom. Saw DW standing in front of intake grill, and she said she was enjoying the warmth!
I pulled off the grill and there was a 12" separation in the foil duct dumping all the warm air! Just made Home Depot before closing.