Do furnace ignitors go bad?
Matthew Barrera
Score: 4.5/5 (67 votes)
No matter which type of ignitor is in your furnace, this chain of events lights your heater so that it blows hot air. 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.
How do I know if my furnace ignitor is bad?
- The Furnace Stops Running. When a furnace won't run at all, check for a bad ignitor. ...
- Your Furnace Blows Chilly Air. Unless you've set your thermostat to COOL, your furnace should not blow cold air. ...
- Does Your Furnace Short Cycle? ...
- A No Glow Ignitor. ...
- We Can Replace Your Furnace Ignitor.
How often should a 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.
What causes a furnace ignitor to go bad?
As mentioned above, sometimes the cause of a furnace ignitor failing to ignite is due to a safety issue, such as a clogged air filter, for instance. ... So, if your furnace is failing to ignite, it's a good idea to check the air filter. If it looks clogged up, then this is probably the source of the problem.
Can you repair a furnace ignitor?
A gas furnace ignitor is what lights the gas, which is necessary for heat supply. ... Problems with a gas furnace ignitor can be fixed using simple techniques. However, if the ignitor does not work at all, it will have to be replaced.
Furnace Not Igniting - How to Check and Replace Ignitor
How long do furnace igniters last?
Fortunately, you can replace the ignitor without replacing the full furnace. Most ignitors last about seven years. Keep reading to learn how you can tell if your furnace problem is a faulty ignitor.
How long does a silicon nitride igniter last?
When should I replace my furnace ignitor? Silicon nitride ignitors have an average lifespan of 7 to 15 years. So, after about 7 years, you may have to replace the ignitor.
Does Lowe's sell furnace ignitors?
White-Rodgers Furnace Igniter in the Furnace Accessories department at Lowes.com.
How much is an ignitor switch for a furnace?
The labor costs involved to replace the ignitor will vary by area but generally start at $75. Including the part and service, the costs can go up to $300. When the furnace ignitor malfunctions, the furnace won't operate.
How long do furnace pressure switches last?
It will be working perfect for 2-15 days and then have a bad day.
What is hsi on furnace?
Hot Surface Igniters are Resistance Heaters
A 120-volt HSI will glow at around 2500 degrees Fahrenheit. ... Several control boards these days are made to support an 80-volt igniter. This way the carbide breaks down slower, adding life to the system.
What is pressure switch in furnace?
A furnace pressure switch is an automatic safety feature located near the motor. It shuts the furnace down if it senses negative pressure created by the draft inducer motor.
How do you clean the igniter?
Use the toothbrush and a paste of baking soda and water or a 50/50 vinegar solution to clean the surface of the igniter. Avoid cleaners with bleach, ammonia or any other chemical that could produce noxious fumes. If you have to chip material off it, use a plastic toothpick or kitchen knife.
Can you manually light a gas furnace with electronic ignition?
If your furnace is equipped with an electronic igniter, you cannot light the furnace manually. However, you may be able to get the furnace working by turning off the igniter and resetting it. Find the paperwork for your particular furnace to locate the reset button or switch.
What is the resistance of a furnace ignitor?
Resistance should be between 37-68 ohms. If the igniter and the surrounding air are at about 70°F and the igniter wires are not connected to any other electrical components, the resistance of the igniter should not exceed 75 ohms. If it does, the igniter should be replaced.
Where is the flame sensor in my furnace?
WHAT IS A FURNACE FLAME SENSOR? A furnace flame sensor is a very basic part of your furnace. It's located on the burner assembly and is just a thin metallic rod. It's usually bent, and it sits just in front of the pilot flame inside the furnace.
Do pressure switches go bad?
Over time, the pressure switch will begin to degrade. Such is the nature of mechanical components. If you find that your water pressure is low, you could be dealing with a worn out well pump pressure switch.
