检查恒温器设置 – The fan should be set to auto; In other modes, the fan will run continuously. When the fan is set to auto it will only blow warm air.
炉过热 – Most commonly a dirty air filter will block airflow, causing your furnace to overheat. 更换空气过滤器.
检查你的飞行员 – Newer furnaces have burners not a single pilot like older furnaces. If you don’t see the burners lit or the pilot on, its time to call an HVAC repair company. We do not recommend attempting to relight the pilot or access the burners on your own.