vents, reset the furnace by switching off the power: Either turn off the switch located on or near the furnace, or flip the circuit breaker that controls the furnace. Wait a minute, then switch the power back on.
Not getting enough heat? Check the furnace filter. Schmahl says, “When I ask people when’s the last time you changed the furnace filter and they give me that deer-in-the-headlights stare, I know what the problem is.”
One of the most common causes of insufficient heat or cooled air is a plugged furnace
