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Why does my furnace click when it shuts off?
Typically, when a heater makes a loud banging noise when it turns off, it’s the sound of metal contracting. Once the heating cycle stops, the sheet metal of the ductwork and the metal panels of your furnace cool and contract, producing a ‘bang’ or ‘pop’ that you hear inside your home.
Why is my furnace making a clicking sound?
The common sources of a furnace clicking sound are: Gas valve — A broken, jammed, or clogged valve may fail to let out gas. Flame sensor or thermocouple — This part senses the presence of a flame and tells the gas valve to open. If it’s faulty or dirty, it won’t send the signal and the ignitor will click.
How do you fix a furnace that clicks?
Loud clicking sounds can be heard when inducer blowers and fan shafts are clogged by buildup or when bearings are worn out. Bearings on the main blower motor might click as the furnace runs because the shaft is rusted or dirty. Cleaning and lubricating the fan shaft will help fix the problem and prevent premature wear.
Can a furnace explode?
A furnace explosion is usually the result of ignition and instantaneous combustion of highly flammable gas, vapor, or dust that has accumulated in a boiler. The effect of the force from the explosion is often much greater than the boiler combustion chamber can withstand.
How do you know if your furnace ignitor is bad?
Your furnace won’t run: The most obvious sign that your ignitor is bad is that it won’t ignite, and this generally manifests itself in your furnace failing to run when you activate it. One word of caution, though: this can also be caused by other issues, some of which are electrical.
Can hear your furnace click on but it does not fire up?
The Pilot Light (Faulty Ignition Sensor) The pilot light or ignition sensor is usually the most common issue when your furnace will not ignite. This is typically the problem if you can hear your furnace click on but it does not fire up. If the sensor or ignitor is dirty, it will need to be cleaned.
How long should a furnace ignitor last?
Don’t worry—an ignitor that goes bad is common for most furnaces. Fortunately, you can replace the ignitor without replacing the full furnace. Most ignitors last about seven years.
When should I worry about my furnace noise?
In most cases, it is wise to call a service technician. A pinging or popping sound is most likely coming from one of the ducts and is not really something to worry about. If you hear an odd vibrating noise or whining, it may indicate a problem with your furnace and a technician really needs to check it out.
Is it normal for a furnace to make a hissing noise?
Escaping air can cause hissing. If it’s a light hiss, it could be caused by an air filter that isn’t installed properly or is the wrong size. Too many closed vents or furniture blocking air flow may also cause a hissing sound. If it’s a loud hiss, it may be the result of a leak somewhere in your ducts.
Can my furnace catch on fire?
Yes, a furnace can catch fire. The following are reasons your furnace can catch fire: Your furnace’s air filter is blocked. Your furnace’s gas pressure is too high. There is a crack in your furnace’s heat exchanger.
How much does it cost to replace a furnace ignitor?
Here’s the bottom line: Whether for a natural gas furnace, oil, or a propane furnace, replacing a furnace ignitor–including parts and labor–will cost you around $300 – $425 for a qualified contractor to install. Compare that to, say, a draft inducer motor, which will cost $400 – $1,500 to replace.
How often should furnace ignitor be replaced?
According to the Gas Furnace Guide, ignitors have an average lifespan of four to seven years. So, after about seven years, you may have to replace the ignitor; however, you probably won’t have to replace the entire furnace because other parts, such as the heat exchanger, can last more than 15 years.
Can a furnace ignitor be cleaned?
If your furnace has a spark ignitor and it’s working haphazardly, it too could be covered with soot, and a blast of compressed air may be enough to clean it. Compressed air can also clean a blocked pilot tube that is causing the pilot flame to burn weakly or not at all.
Will a dirty filter Keep furnace from working?
1. Dirty furnace filters. Dirty air filters are often the culprit behind an inefficiently performing furnace. That’s because air filters trap dust, dirt and debris like hair, which over time can restrict or block vital airflow, overheating the heat exchanger and preventing your furnace from working as it should.
