What Is An Inducer Motor On A Furnace? Facts You Should Know

To understand the inducer motor on a furnace, let me explain the definition, purpose, and components of the motor. The inducer motor helps with the combustion process, where it creates draft inducer blower, which leads to the opening of the pressure switch and the start of the furnace burners. The purpose of the inducer motor is to help with the heating cycle and ensure safety by preventing back venting of combustion gases. The components of this important motor include the draft inducer blower, control board, pressure switch, and housing.

what is an inducer motor on a furnace

Definition of Inducer Motor

The inducer motor is a key part of a furnace, during combustion it draws air into the burners. It’s important for efficiency and safety. It’s installed in the exhaust and sucks gases out to create negative pressure.

Negative pressure allows gas to mix with outside oxygen during combustion. The reaction produces heat energy. It also helps control carbon monoxide levels and limits gas risks in the home.

Unfortunately, dust and mechanical vibrations can damage the motor. If blocked or damaged, it can cause equipment malfunctions that lead to house fires.

Earlier furnaces didn’t have induction motors until tech advancements made it possible. Now modern-day furnaces have these components as regulation to keep indoor temps constant.

So why does the inducer motor matter? No motor, no heat, no happy.

Purpose of Inducer Motor

The Inducer Motor is vital for a furnace. It creates suction which removes exhaust gases from the combustion chamber. It runs fast and quiet, plus it’s tough enough for high temperatures and harsh conditions.

If it fails, combustion could be wrong or CO emissions could rise, or the system might even shut down. HVAC.com reports that inducer motors are normal in residential furnaces with high efficiency.

Understanding how the inducer works means your furnace runs properly, and there’s no danger of gas leaks or ventilation issues. Check out the awesome contribution of the inducer motor components, no need to thank them.

Components of Inducer Motor

The motor that pumps air into a furnace is known as an ‘Inducer Motor.’ It comprises of essential components like an impeller fan, housing, motor and control board. The fan creates a suction and the housing supports the other sections. The control board gives power to the motor so it can spin the blades and produce airflow.

The performance of the motor depends on its design. Therefore, installation and maintenance are key. A worn-out belt or dust on blades can cause friction and damage.

Inducer Motors were not used until twenty years ago. Before that, furnaces relied on a Natural Draft Venting System. Today, they use condensing furnaces with low temperatures. This requires an inducer motor for efficiency and reduced heating costs.

Before 1990s, furnaces caused CO poisoning, fires and deaths. This led to research into safer heating solutions and advancements in induction motors. Without this motor, your furnace is useless.

How the Furnace Works with Inducer Motor

To understand how your furnace works and how the inducer motor plays a crucial role in its functioning, let me explain the heating system process. With the inducer motor and furnace burners working together, heat exchanger warms the air. 

During a previous heating cycle, the draft inducer blower made sure that combustion gases were pushed out. In this section, we will explore the role of the inducer motor in these processes, including how it works in conjunction with the furnace burners and draft inducer blower.

Heating System Process

The heating mechanism needs warming up to keep our homes comfy during chilly months. The combustion engine starts it all. It activates the inducer motor to suck air in. This sets off the gas and creates heat inside the furnace chamber. Then, the heat circulates via ducts to different rooms.

The inducer motor is important. It helps with air flow and keeps harmful gases out. It also helps fuel burn optimally for efficient heating. So, it’s key to clean and maintain it regularly.

If ignored, the heater can lead to more expensive bills, poor air quality, or even carbon monoxide poisoning, a deadly gas that can’t be detected without special equipment.

Inducer Motor and Furnace Burners

The furnace burners and inducer motor have a special relationship. The motor’s job is to provide air flow for combustion. Data tells us that the motor’s speed affects performance. BTUs from the furnace burner help heat space. But, it’s not just these factors at play. Size and efficiency of the furnace unit matter too.

One homeowner learned the importance of a working inducer motor the hard way. In the middle of winter, the motor went out. A timely repair made sure their home stayed warm during the coldest days.

So, let’s take a journey through the exciting world of draft inducer blowers, where heating cycles and air flow come alive.

Previous Heating Cycle and Draft Inducer Blower

Starting the Heating Process & the Role of the Inducer Motor.

The thermostat sends a signal to the control board. This starts up the inducer motor. It creates a negative pressure in the heat exchanger

This causes combustion gases to flow out through the flue. Fresh air enters and mixes with the gas before ignition.

Thermostat signalSent to control board
Control boardSends signal to inducer motor
Inducer motorNegative pressure for combusion gases exit & entry created

Additional Details on Furnace Operation.

It’s important the draft inducer blower works correctly during a heating cycle. It helps keep the proper airflow. This prevents carbon monoxide buildup and prolongs equipment lifespan.

Signs and Possible Issues with Inducer Motor

To help you identify possible issues and solutions with your furnace, let’s talk about signs of a problematic inducer motor. The inducer motor is a vital component that starts the heating cycle by opening the pressure switch. 

In this section, we will discuss common noises and failure symptoms that indicate a bad inducer motor. Additionally, we will cover back draft and tapping sound issues that could be due to a faulty inducer motor. Lastly, we will explain the reason why an inducer motor needs to be replaced and how it can help resolve furnace combustion issues.

Common Noises and Failure Symptoms

An inducer motor is part of a furnace. It helps rid your home of harmful gases while heating. But when it starts making strange noises or stops working, it can cause problems.

Common Signs and Symptoms of a Faulty Inducer Motor:

  • Strange or loud noises
  • Short-cycling
  • Poor draft and air flow
  • Bad odor and poor indoor air quality
  • Higher energy bills
  • Furnace shutting down

Be aware of any changes in your furnace’s performance. If you hear weird sounds or notice other issues with the inducer motor, get help right away.

To fix the problem, you may need to clean blockages in the hoses or replace corroded parts. It’s important to find an expert technician who can identify the issue and provide the right solutions.

Regular maintenance on your furnace components, like motors, can help prevent future problems. This will give you peace of mind and save you from expensive repairs. Who wants scary movies when back-drafts and tapping sounds can give you goosebumps about your furnace?

Back Draft and Tapping Sound

Unusual noises like ‘backdraft’ and ‘tapping’ from your furnace could mean trouble with the inducer motor. 

Points to consider:

Backdraft?Blockage in vent or chimney. Can release harmful gases into your home.
Tapping sound?Problem with bearings or blades of inducer motor. Can decrease performance & increase repair costs.
Uneven temperature?Inducer motor not working efficiently. Inadequate heat distribution.
Increased energy bills?Inducer motor having to work harder.

Pay attention to signs, it may need professional attention. Don’t delay, get help. 

Carbon monoxide poisoning can have severe health implications. Address any issues at first sign of trouble. If your inducer motor sounds off, replace it or visit the vet.

Bad Inducer Motor and Reasons for Replacement

Inducer motors are essential for fuel-efficient and safe furnace operation. Knowing when to replace a bad motor is key. Reasons for failure range from mechanical blockages and worn-out bearings, to electrical issues.

Damaged motors lower efficiency, cause strange noises, and heat up the system. Debris clogging the exhaust pipe or gas combustion problems can also lead to dangerous carbon monoxide leaks.

Regular cleaning and lubrication prolongs motor life. But if signs of malfunction appear, replacement is necessary. Trained professionals guarantee personal safety and cost-effectiveness.

How to Service and Repair the Inducer Motor

To address issues with your furnace, you may need to service or repair the inducer motor. Don’t worry if you’re not familiar with the process, I’m here to help. 

In this section, I’ll guide you through the steps you can take to troubleshoot inducer motor problems. If the issue persists, you may need to call a professional for repair. Finally, we’ll briefly discuss replacement parts and the price range for inducer motors.

Troubleshooting Inducer Motor Issue

To troubleshoot inducer motor issues, check for visible problems. Inspect the wiring and connections. Use a multimeter to test voltage and current flow.

Service and repair involves disassembling, cleaning and replacing damaged parts. Consult a professional if unsure.

Regular maintenance helps prevent issues. Clean and lubricate all components. Look for signs of wear or damage.

Pro Tip: Follow manufacturer guidelines when repairing or servicing to ensure safety.

Calling a Professional for Inducer Motor Repair

To fix the inducer motor, professional help is needed. If you are not familiar with furnaces and heating systems, an expert should be called. Professionals are skilled at troubleshooting and use special tools. Plus, their work is guaranteed.

Before getting professional help, check the power and replace the air filters. Don’t disassemble the furnace as it may worsen the issue.

Regular maintenance by certified technicians will help keep your heating system running optimally while avoiding pricey repairs in the future. Look for reliable repair companies before requesting services. Be prepared to pay big bucks for the inducer motor replacement.

Replacement Parts and Price Range for Inducer Motors

When it comes to replacing parts on your inducer motor, it’s important to know the price range and what’s out there. Parts can differ depending on the model and make. 

Here’s a list of common parts and their prices:

PartPrice Range
Inducer Motor$100 – $500
Inducer Fan Blade$20 – $50
Pressure Switch$30 – $60
Circuit Board$50 – $150

To make sure your inducer motor runs efficiently, pick genuine parts from trustworthy dealers. If unsure, ask an expert technician for help. It’s key to look at the compatibility too. Not all parts fit all models and brands. Contact the manufacturer or a certified technician for advice.

Recently, one customer got tricked by an aftermarket fan blade advertised as “universal.” But it didn’t fit and caused more damage, increasing repair costs. 

Notice the size, hole pattern, rotation direction, and shape when selecting parts. Stay away from off-brand products without clear compatibility info.

Importance of Maintenance and Upkeep for Inducer Motor

To ensure proper functioning of your gas furnace, it is crucial to perform maintenance and upkeep of the inducer motor. With the potential for issues like bad inducer motor, strange noises, or failure to start, proper maintenance is key. 

In this section, we will discuss the importance of maintaining the inducer motor and its components for optimal performance of your heating system. 

Regular Cleaning of Inducer Motor Components

It’s important to keep inducer motor components in good condition. Regular cleaning prevents dirt and dust build-up, which can clog the airflow. 

Here’s a 3-step guide for proper cleaning:

  1. Turn off the power. Before you start, make sure there’s no electricity running to prevent accidents.
  2. Clean the filter. Remove it from the unit and use a brush or vacuum attachment to remove debris.
  3. Clean the blades and other parts. Use a cloth or brush with mild detergent to clean blades, casing, and fan housing. Don’t touch any electrical components with wet hands.

Apart from cleaning, check for any wear and tear on motor parts. If you spot any damage, get it replaced or repaired right away.

Regular maintenance of your inducer motor saves electricity and keeps your home safe from dust. Make sure to schedule regular maintenance checks by qualified technicians. 

Don’t wait, safeguard your family and home now. Plus, make sure to check the voltage. Avoid the smell of burnt electronics.

Checking the Voltage of Inducer Motor

Inducer Motor Voltage is key for HVAC systems’ proper functioning. Wrong voltages can lead to poor performance and sub-par results. 

To check Inducer Motor Voltage, take these steps:

  1. Switch off HVAC system and open panels for inspection.
  2. Locate control board, usually inside furnace or air handler cabinet.
  3. Identify Inducer Motor wiring connected to control board.
  4. Set multimeter to measure voltage and connect it to motor wires while grounding yourself.
  5. Turn on HVAC system power and run for few seconds, noting multimeter readings.
  6. Compare readings with manufacturer specs. If different or odd, contact expert for troubleshooting.

Remember that voltage may differ depending on AC or DC of your system.

My friend’s service call was due to negligence as he had not checked his furnace two weeks into winter. Lack of Inducer Motor maintenance caused it to fail in freezing temperatures. Regular maintenance can help prevent similar issues. 

Putting off maintenance is just like postponing a dentist appointment, it’ll only cause more pain & expense.

Maintaining Pressure Switch and Control Board

To keep your heating system running at its best, regular maintenance of the inducer motor and related parts is key. This includes taking care of both the pressure switch and control board. 

Here’s a 6-step guide to help:

  1. Disconnect your heating system from power.
  2. Gently clean pressure switch with a soft brush or compressed air.
  3. Use a dry cloth or compressed air to clean control board.
  4. Check wiring on both components for any damage or corrosion.
  5. Reconnect your heating system to power and test all components work.
  6. If any issues arise, contact a licensed technician for help.

Neglecting these components can result in poor performance, higher energy costs, or even system failure. Keeping records of all maintenance can help in the case of future problems or when selling your property.

Pro Tip: Regular inspections and tune-ups by a professional can save money in the long run by catching potential problems earlier. Don’t neglect maintenance until your inducer motor decides to call it quits.


To conclude, I highly recommend seeking professional service for any issues related to your inducer motor and furnace as it may require specific expertise to identify and address. It is important to take note of any unusual noises or malfunctions with your furnace, as this may indicate a bad inducer motor. The overall efficient and safe functioning of your heating and air conditioning system, including the inducer blower and draft inducer motor, is crucial for the proper and safe circulation of air and combustion gases. Servicing extends the life of your furnace and inducer motor, guarantees their optimal performance, and increases energy efficiency.

It can also identify potential problems before they get worse. Novice repairs are not safe when dealing with electrical appliances like furnaces. Professionals have the knowledge, skills, and tools for effective servicing while keeping safety in mind. If you don’t get regular maintenance service, you may face reduced performance, higher energy bills, costly replacements, and shorter lifespan of the furnace and inducer motor. It’s essential to spot and fix any inducer motor issues. This is really important since it plays a major part in HVAC systems, which are needed to keep indoor air quality. Not taking care of the problems can lead to inefficiencies, higher energy costs, and bad impacts on health.

To make sure the HVAC system runs smoothly, it’s necessary to watch out for any signs of issues with the motor. Examples include odd sounds, vibrations, or airflow inconsistencies. Finding these signs early and getting help from experienced technicians can help prevent breakdowns and cut down on emergency repair costs. Plus, routine maintenance and upkeep can help avoid future motor problems and lengthen the life of your HVAC system. Inspecting and cleaning filters, ducts, burners, and other components is necessary as they can have a big impact on the performance of an HVAC system.