Final answer:
Possible causes of a furnace lockout are ignition problems and safety concerns.
Step-by-step explanation:
Furnace Lockout Causes
There are several possible causes for a furnace lockout. Two common causes are:
- Ignition Problems: If the furnace's ignition system fails to ignite the burners, it can lead to a lockout. This can be due to issues like a malfunctioning igniter, dirty or misaligned burners, or a faulty flame sensor.
- Safety Concerns: Furnaces have safety mechanisms in place that can cause a lockout if they detect any potential hazards. This can include issues like blocked vents or air intake, overheating, or a malfunctioning pressure switch.