How Does a Draft Inducer Work? A draft inducer is a fan that is located inside of the furnace near the heat exchanger . When the furnace begins a heating cycle, the draft inducer turns on up 30 to 60 seconds before the burners are lit and continues to run throughout each heating cycle.
How do I know if my draft inducer is bad?
One of the first indications of a bad draft inducer motor is likely to be the sound it makes . A failing inducer motor may create a noise shortly after a heating cycle begins. This could be a tapping noise, or a humming or whirring sound.
How does a inducer motor work?
The inducer motor turns on and draws combustion air into the furnace . This helps to make sure the gas is burning efficiently. Next, an ignitor will either glow or spark to ignite the gas that starts flowing. This gas ignites into flames while the hot air and obnoxious gases are drawn into the heat exchanger.
How long does a draft inducer motor last?
How long does a furnace inducer motor last? The average lifespan of your furnace is typically between 15 and 20 years . However, there are a variety of reasons that could cause your furnace inducer motor to fail before this time.
When would you use a draft inducer?
When your furnace begins a heating cycle , the draft inducer is one of the first devices that turns on. In fact, the draft inducer starts up 30-60 seconds before the burners are lit and continues to run throughout each heating cycle.
What causes inducer motor failure?
Most inducer motors failures are simply attributed to the older age of the furnace . In most cases, the internal bearings wear out and since the unit is a sealed unit, there is no way to repair the original motor. Instead the unit is simply replaced with a new one.
How much does it cost to replace a draft inducer motor?
A replacement draft inducer motor will cost between $500 and $700 .
What is the purpose of an inducer motor?
The draft inducer motor was introduced when the government mandated efficiency standards for furnaces. The purpose of the inducer motor is to move air and gasses out of the furnace and up through the heating vents . This determines how much and how fast air will flow through the heat exchanger.
What does an inducer do?
In molecular biology, an inducer is a molecule that regulates gene expression . ... The gene is expressed because an inducer binds to the repressor. The binding of the inducer to the repressor prevents the repressor from binding to the operator. RNA polymerase can then begin to transcribe operon genes.
How much does an inducer motor cost for a furnace?
A draft inducer motor costs $200 to $1,500 to repair or replace. A simple fan wheel might cost $20 in parts with another two hours in labor. Replacing the entire unit runs $600 to $1,500, depending on the model and brand.
Why are draft inducer fans necessary in today's furnaces?
The temperature difference between the air entering the furnace and leaving the furnace. Why are draft inducer fans necessary in today's furnaces? ... To separate the combustion gas from the circulating air while transferring heat from the combustion gas to the circulating air .
What is the difference between forced draft and induced draft?
Forced-draft fans focus the pressure and volume at the outlet of the fan to push air through a system, creating positive air pressure. Industrial induced draft fans operate by focusing the pressure and volume at the inlet of the fan to pull air through a system.
What is the purpose of a combustion air inducer in a gas furnace?
A combustion inducer blower is a unit used in heating, ventilating and air conditioning equipment such as furnaces. The inducer blower draws air through the furnace's combustion passageway to promote a more efficient running of the combustion, and to allow thorough heat transfer.
