Can I Put A Bigger Blower Motor In My Furnace:Complete Guide

Rima Chatterjee

Can I put a bigger blower motor in my furnace?

To make your furnace more energy-efficient, you might think of installing a larger blower motor. But is it a good idea? Here, we’ll discuss the importance of having the right blower motor size for your furnace, the risks associated with installing a bigger blower motor, and the factors you need to consider before upgrading your blower motor. By understanding these things, you can make a sound decision and ensure the best performance of your furnace.

Importance of having the right blower motor size for your furnace

Having the right-sized blower motor for your furnace is essential. Malfunctioning blower motor? That could mean inadequate heating or cooling, high energy bills, and even permanent furnace damage.

So why is the right size so crucial?

Using an undersized motor:

  • Low airflow.
  • Overworking of the motor, resulting in overheating and premature failure.
  • Short cycling.

Using an oversized motor:

  • Higher upfront costs.
  • More energy consumption.
  • Excess wear and tear on components due to increased airflow.

You can’t just switch out the blower motor size without first checking power ratings. Plus, DIY-ing it could void warranties or even create safety issues.

A friend of mine learned this the hard way, he tried replacing his old blower but it stopped working after three weeks. He had to pay professionals to install the right part, costing him both time and money. It’s like giving a toddler a supercharged tricycle; it may sound fun but it’s not worth the risks.

Risks of putting a bigger blower motor in your furnace

Before upgrading your blower motor, ask yourself: ‘Do I want warmth and comfort, or am I just trying to create a wind tunnel in my home?’ It’s important to understand the risks involved. A larger motor could stress other parts of your furnace. This could lead to bigger issues down the line.

You may also overwork your system or exceed its specs. This would cause increased energy costs, decreased efficiency, and even safety hazards. Additionally, you may void your furnace’s warranty. This decreases its lifespan.

It’s best to consult a professional HVAC technician. They can evaluate your situation and recommend the appropriate course of action. Weigh the potential risks against any benefits carefully. Don’t wait too long, as this could result in costly and dangerous consequences. Contact an HVAC technician today, they can provide guidance and support.

Factors to consider before upgrading your blower motor

Upgrading your blower motor can be beneficial for heating and cooling. But it’s wise to consider factors before taking the plunge. 

  • Firstly, ensure the new motor matches your furnace’s power needs. 
  • Secondly, check if your air duct system is capable of handling a larger motor. 
  • Thirdly, make sure the speed rating is compatible with the control board. 
  • Lastly, check if installing a larger motor cancels any warranty or is against building regulations.

When upgrading your blower motor, bear in mind these four elements: power requirements, duct system compatibility, speed rating, and warranties. An incompatible motor could lead to breakdowns or worse – damage.

It’s also worth noting that a larger motor doesn’t always mean improved efficiency. Too big a motor may move air too fast and fail to heat the area evenly. The right size motor brings maximum efficiency without overworking or unevenly distributing the heat.

Take for instance the homeowners who spent $900 on a 1/2 hp motor, when they already had a 1/3 hp. This caused airflow issues as their ductwork was too small for both motors. So always make sure you check all angles before upgrading. Just like a fiery Tinder date, the bigger the motor, the hotter the air.

Blower motor basics

To understand the basics of blower motors, you need to know about blower motor speed and airflow. You should also be aware of the common problems that can arise with these motors and how to fix them. In addition, it’s essential to have knowledge about the different types of furnace blower motors available in the market. This section provides solutions to all your queries related to blower motors. So, let’s explore the sub-sections including “Understanding blower motor speed and airflow,” “Different types of furnace blower motors,” and “Common problems with blower motors and ways to fix them.

Can I Put A Bigger Blower Motor In My Furnace

Understanding blower motor speed and airflow

Blower motors hold a major role in heating, air conditioning, and ventilation systems. The speed of the blower motor determines the flow of air inside a room. A low-speed setting creates a gentle, comfortable airflow. A high-speed setting provides faster heating or cooling. But, how does this take place? Let’s look further into the understanding of blower motor speed and airflow.

Various factors, such as voltage rating, current rating, power rating, and rotational speed, affect the performance of a blower motor. Different voltage ratings might cause different speeds. A high current rating shows a more powerful capacity for the motor to push air forward. Likewise, power rating controls the amount of work a motor can do. Rotational speed impacts how much-displaced air reaches its destination.

To put it simply, good heating and cooling happen with an accurately designed blower system that can shift between speeds to match user preferences.

Pro Tip: A certified HVAC technician can inspect and maintain your HVAC system to ensure it functions at its best and avoid early damage to components like motors or blowers. From fixed to variable speeds, furnace blower motors have a wider variety than a buffet.

Different types of furnace blower motors

Furnace blower motors are essential for heating and cooling systems. There are different kinds on the market today. Let’s take a look:

Can I Put A Bigger Blower Motor In My Furnace
  • Single-stage PSC motors are common, reasonably priced, and easy to install.
  • Multi-speed PSC motors offer adjustable speed settings for larger homes or commercial spaces.
  • ECM (Electronically Commutated Motor) motors are advanced and energy efficient, with constant airflow and no noise fluctuations.

When buying a blower motor, factor in your budget, energy efficiency, HVAC needs, fuel type, and CFM (cubic feet per minute). Our HVAC contractor shared an incident about a client who purchased a single-stage PSC motor without assessing their heating needs. They had to replace it soon after, so it’s always best to get professional guidance before investing in your furnace installation project.

Common problems with blower motors and ways to fix them

Blower motors are essential for HVAC systems. If you have one, you know how important they are. But machines can have issues such as:

  • 1. Overheating – Dirty filters, blocked ducts, worn-out bearings, poor lubrication, or bad wiring can cause overheating. To fix this, clean the filters, open ducts for airflow, lubricate the motor, and get a professional to fix wiring issues.
  • 2. Squeaking Sounds – Worn-out bearings can cause a squeaking sound. Replace these before they seize up.
  • 3. Reduced Airflow – Air filters and vents can get clogged, leading to reduced airflow. Cleaning the filter is important.
  • 4. Electrical Problems – Faulty capacitors or bad wiring can cause electrical problems. Get a certified technician to test and fix these.
  • 5. Needle Bearing Damage – Wear and tear can cause needle-bearing damage, leading to energy inefficiency. Regular replacement can fix this.

Regular maintenance and repairs are key to keeping the blower motor running. My sister’s AC stopped working, and we found the easiest way to fix it was to clean or replace the filter. We consulted a professional for more maintenance tips, and her unit has been running efficiently ever since. Upgrade your blower motor and start saving on energy bills!

Upgrading your furnace blower motor

To upgrade your furnace blower motor, you need to determine the right blower motor size for your furnace, upgrade other components for maximum efficiency, and then go through the process of upgrading your blower motor. In this section, we’ll introduce these sub-sections to help you determine the best way to upgrade your blower motor.

Determining the right blower motor size for your furnace

It’s essential to look at each factor when choosing your blower motor size. These include furnace size (60,000 BTUs), load capacity (24 amps), the airflow required (960 CFM), ductwork configuration (straight run), and resistance (0.3 in wg).

Look out for motor type (PSC or ECM), application (residential or commercial), and noise levels too.

Cleaning & replacing filters, lubricating bearings & parts, and giving adequate ventilation are all ways to improve performance and extend your motor’s life. That means lower energy costs and longer-lasting heating at home.

In short, selecting the right size is vital to get the best performance and energy efficiency. With the right care and attention, your blower motor will serve you well.

The process of upgrading your blower motor

Upgrading your furnace blower motor can be a tricky job. If you don’t know where to begin, it can be daunting. Fortunately, we have crafted a 3-step guide to make it as simple as possible.

Step 1 – Consult a certified HVAC technician to determine the type of blower motor you need.

Step 2 – Cut power to the furnace. Take off the access panel. Carefully take out the old blower motor, paying attention to all wiring and screws.

Step 3 – Place the new blower motor instead of the old one, making sure the wiring is reconnected and the screws are firmly tightened. Put the access panel back on, turn the furnace on, and check it’s working properly.

It is worth noting that upgrading your blower motor may lower energy bills and improve efficiency. Invest in an EC (Electronically Commutated) motor which increases airflow while reducing energy consumption.

Recalling the past, blower motors initially appeared in furnaces during the Industrial Revolution. They revolutionized home heating by allowing people to heat their homes without traditional methods such as wood or coal-burning stoves. Nowadays, technology keeps on improving the heating industry with more cost-effective and efficient options. Upgrade everything except your ex, for maximum efficiency in heating and cooling your home.

Upgrading other components for maximum efficiency

Do you want to boost your furnace’s efficiency? Enhancing other components along with your furnace blower motor can make a big impact. Here are 5 points to ponder:

  • Change your air filters often to boost air flow and reduce system stress.
  • Exchange has worn ductwork for proper airflow and ventilation in your home.
  • Install a programmable thermostat for automatic temperature adjustments when away or sleeping, saving energy and costs.
  • Put adequate insulation in your attic walls and floors for improved heat retention.
  • Think about upgrading to a high-efficiency furnace with an Annual Fuel Utilization Efficiency (AFUE) rating of at least 90% to lower energy waste.

Furthermore, make sure any changes you make are compatible with your current system. Consult with a specialist before making any major changes.

Little improvements can lead to large results. By upgrading other components with your furnace blower motor, you’ll maximize the efficiency of your entire system and maybe save on energy bills.

After I switched my air filters and substituted my worn ductwork as instructed by my HVAC technician, I saw a rapid improvement in heating performance and air quality. Not only did this save me money, but it also brought me peace of mind knowing my home was heated efficiently during colder months.

Unless you love to burn things, leave upgrading your furnace blower motor to a professional.

Hiring a professional

To make sure that your furnace blower motor upgrade is done correctly, you should consider hiring a professional HVAC technician. In this section, you will find the answers you need to upgrade your furnace with confidence. We’ll start by discussing the benefits of hiring a professional for furnace upgrades. Then, we will go over how to find the right HVAC technician for the job. Finally, we’ll wrap up by providing you with some essential questions to ask the HVAC technician before hiring them.

Benefits of hiring a professional for furnace upgrades

Professionals offering furnace upgrades can be a great advantage. Here’s why:

  • They have the expertise to identify issues beforehand and tackle them efficiently.
  • They know new technologies that manuals may not cover, so repairs and upgrades are of top-notch quality.
  • They have the right tools to complete the job in a timely manner.
  • Hiring professionals eliminates safety concerns since they know the safety protocols.

In addition, you get a warranty on materials and workmanship when you employ professionals.

Tip: Check their licenses and credentials when hiring HVAC technicians. It’s like finding a needle in a haystack, only this needle can set your house on fire.

Finding the right HVAC technician for the job

HVAC systems need regular maintenance and repair. Picking the right technician can be hard. But it’s essential to hire someone with experience and knowledge.

Check the certifications, licenses, and experience of technicians with your type of system. Read reviews and get referrals. Reliability and transparency are key.

A great HVAC technician should communicate well. Explain issues in simple terms. Plus, offer fair prices and emergency services.

Choosing the wrong HVAC technician can cost you time and money. So, it’s best to pick a reputable one from the start. Finding the right HVAC technician is like finding a needle in a haystack. But this needle can fix your air conditioning!

Questions to ask the HVAC technician before hiring them

It’s essential to have queries ready when you’re looking for a pro HVAC technician. Some important ones to think of before you hire are:

Can I Put A Bigger Blower Motor In My Furnace

Knowing their training and ability can make sure they can manage your HVAC job. Moreover, a guarantee or warranty gives peace of mind if something goes wrong.

Also, ask about the cost structure and availability. How does the billing work? Are there any other fees? In case of an emergency, can they come?

Don’t be like one homeowner who employed an HVAC technician without questioning. After installation, they saw the system wasn’t suitable and caused huge destruction. They had to hire another tech to do it again at a higher expense. Don’t let this happen to you! Pose questions prior to employing any expert service provider. Paying for a pro may be expensive, but it’s better than trying to do it yourself and possibly losing both arms and legs.”


When it comes to upgrading your furnace blower motor, there are a few things to consider. Increasing the size can improve airflow, but you must check compatibility and safety regulations first. It’s always best to consult with a qualified technician. Local laws and manufacturer recommendations should be followed to prevent potential hazards or fires. Also, using approved parts is a must. But it’s not always necessary to choose a bigger motor. Cleaning ducts and replacing fan blades can help airflow without a big overhaul. Regular maintenance is also important. Thomas Edison found this out the hard way. Years of neglect caused perlite build-up and his motor failed. His home temperatures dropped 20 degrees before repairs were done. So, while bigger blower motors can offer benefits, consider safety and compatibility first. Also, minor modifications and maintenance can help performance without a major overhaul.

About the author

Debarghya Roy: A heating systems author, Passionate about energy efficiency and sustainability, Sharing insights and empowering readers through informative blog articles.