Motor: If your furnace seems to be producing heat as usual but still makes a clicking noise, you may be hearing its motor’s bearings or other tiny parts moving around.Electrical components: Electrical furnaces won’t leak gas, but their inner workings can still malfunction and result in a clicking noise.A broken or loose fan blade can cause your furnace to click while running. Either of these can cause the fans to wear out or break. Fan or inducer: Your oil furnace’s fans experience heavy use, and they come into contact with a lot of dirt and debris.Your furnace may also produce a clicking sound if some of its interior parts are damaged, broken or knocked loose. Regardless of the cause, a closed valve can cause your furnace to click endlessly in a futile attempt to light your heating system. Your furnace’s gas valve could shut due to a bad ignition board, poor connection between the board and the valve, or a bad valve itself. Similar to a faulty sensor, a malfunctioning gas valve will confuse the flame igniter and cause it to click repeatedly in an attempt to spark a flame. Unopened gas valve: Without gas, there is nothing for the igniter to light.It will continue to click while the furnace is running until it wears out. When this happens, the spark igniter will operate as if there isn’t a flame. If the sensor is covered in dirt or grime, it won’t acknowledge the flame and signal the rest of the system accordingly. The thermocouple is a sensor that detects a flame and signals the system to shut its gas valve. Dirty or clogged sensor: A dirty or clogged thermocouple can result in prolonged clicking coming from your furnace.Some common issues your furnace’s ignition system may experience include: If there’s a problem anywhere along this process, you may hear your furnace clicking when starting or running. This creates the heat that your furnace blower then distributes throughout your house. At this point, the ignition system starts to build energy so that when the gas valve opens and mixes gas with air in the burner, it can create a small spark to ignite the burner. When you set your thermostat to warm your house, the furnace begins to pull air into the burner. One typical reason you’d find your furnace making clicking noises is that its ignition system is malfunctioning. The most common reasons furnaces make clicking noises are an ignition system malfunction or internal part damage - and both of these situations would require a professional to diagnose and repair. There are various reasons why you’ll hear your furnace make clicking noises when it’s off, while it’s running or during startup, and it’s often something you don’t want to ignore. Hearing a clicking noise from your furnace is not that unusual. Why Is My Furnace Making Clicking Sounds? is here to help. Here’s a look at some of the most common reasons your furnace might be making a clicking noise. When your furnace starts clicking, it’s important to understand the possible causes so you know if you need immediate assistance. However, what happens if you crank up the heat for the first time this season, and you find that your furnace is making a mysterious clicking noise? Is this a cause for alarm? When fall and winter come around, Central PA residents want to ensure they can trust their heating system to function properly for the entire cold season.
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