Now the other half.
The box outside does half the work. We service both halves, every fall.
Every part checked.
Coil, fan, compressor, refrigerant charge. Twenty-two points, written down.
Follow the heat in.
Through the unit, down the supply duct, to the furnace. The same path as the air you breathe.
Blue flame. Good sign.
Yellow means incomplete combustion. We check the burners before the first cold night.
Warm. Finally.
Up through the register and into the room. A furnace tuned in October is a living room you forget about in January.
