How To Clean Furnace Blower? Best Cleaning Guide

Rima Chatterjee


Cleaning a furnace blower fan is like solving a mystery. But instead of clues, you gather dust and debris! To effectively clean it, first understand the basics of the HVAC system. The blower fan is essential to maintaining a comfortable indoor environment. If it’s dirty, it can reduce efficiency, increase costs and even affect air quality.

How To Clean Furnace Blower

Turn off the power supply and remove the front panel. Locate the motor housing, disconnect wires and clips and take clear photos. Unscrew bolts and clips to take out the blower wheel. Inspect the blades for physical damage and balance weights. Clean debris like dirt, dust, hair and mold.

If applicable, vacuum the evaporator coil with caution. Reassemble all parts and restore power to the furnace. Clean your blower fan every few months. If concerned about mold or dirt, contact a technician for help.

Preparing for Cleaning

To prepare for cleaning your furnace blower fan and air handler, you need to take some important steps. With turn Off the Power and gather the Necessary Tools as solutions, you can ensure a safe and efficient cleaning process. Turning off the power will prevent any accidents, and having the necessary tools at your disposal will help you clean the blower assembly more easily. Let’s get started!

Turn Off the Power

Power Down for Cleaning Protection! Make sure you power down the device or electrical system before cleaning. No live currents should be in the area. Here’s a 3-step guide for safety:

  1. Find the power source.
  2. Switch off or unplug.
  3. Test with a non-contact tester.

Be sure to wear protective gear when shutting off power. Remember, electrical accidents can cause serious injuries. A study found that in the US, 4000 people get hurt each year due to electrical incidents. So, let’s make sure we avoid that – by getting the right cleaning supplies!

Gather the Necessary Tools

Having the right tools is key to a successful clean. Here’s how to get what you need:

1Figure out the task.
2Make a list of items.
3Check if you already have them
4Buy any missing tools and read their instructions.

Go for high-quality gear for efficiency and convenience. Keep it budget-friendly by avoiding extras you don’t need. Multi-purpose products are great since they can do several tasks. Research specialized tools for the situation. Preparing appropriately is much easier than not doing so. Get your cleaning done with a blower fan.

Accessing the Blower Fan

To access the blower fan of your furnace, you need to locate the blower assembly and remove the access panel. Once you have done that, you can identify the blower fan. In this section, we will guide you through the process of accessing the blower fan by introducing three sub-sections – locating the blower assembly, removing the access panel, and identifying the blower fan. This will help you to clean your furnace blower more easily and improve your HVAC system’s efficiency.

Locate the Blower Assembly

To get to the blower fan, you need to find the blower assembly. This is where the fan is installed, and it helps move air around your home or building. Here’s a 4-step guide to locating the blower assembly:

  1. Turn off the power to your furnace or air handler.
  2. Open up the cabinet with a screwdriver.
  3. Look for a compartment with the blower assembly. You may need to remove some panels to get to it.
  4. If you can’t find it, look in the unit’s manual or call a professional technician.

Remember to turn off the power before doing any work. Mishandling these parts can be dangerous and cause harm or destruction.

Pro Tip: If you’re not sure how to find the blower assembly, ask an experienced HVAC technician. They can also give advice on how to clean and keep your blower fan running well. Want to make an access panel vanish quicker than a rabbit in a hat? Ask an expert!

Remove the Access Panel

To find the blower fan, you gotta remove the cover panel. Here’s how:

1. Turn off the power. Don’t start any repair without turning off the furnace first.
2. Locate the access panel. That’s where the blower fan is.
3. Unscrew and unclip – Unfasten all that holds the cover.
4. Label wires and hoses – Mark them with tape so you can remember how it was connected.
5. Remove the access panel – Take it off after labeling the wires and hoses.

Be careful! Opening the access panel can be dangerous, with sharp objects or electric components. If you’re not sure, get a pro to help.

Use a flashlight to look for any issues inside the cooling units. Cleaning grime or plugging leaks may fix minor problems without spending much.

Regular maintenance makes everything run smoothly and keeps energy costs down. Check dusty filters inside HVAC elements often. An old filter can block airflow and overburden motors and pumps, shortening their life and driving up electricity bills. Don’t need an expert to spot the blower fan; just look for the thing spinning faster than a hamster!

Identify the Blower Fan

Uncovering the Fan Blower

The fan blower is essential for ventilation systems. It blows air into the ductwork. So, it’s critical to spot the fan blower before you access it.

We have made a table to help you identify it. In residential homes, the fan blower is near the furnace or air handler. In commercial properties, its location depends on the type of system.

ResidentialNear furnace or air handle
CommercialDepends on system type

Be aware that if you cannot locate your fan blower, you may need a professional technician.


To guarantee safe and proper access to your system’s fan blower, here are some tips:

1. Turn off your system – Do this to avoid electrocution risks.

2. Clear debris – Clear any debris around the fan blower. Debris blocks airflow and wears out the motor.

3. Clean and maintain – This will extend the system’s lifespan and keep it running efficiently.

By following these suggestions, you will increase your system’s lifespan and guarantee that the components work correctly. Good luck with getting that fan blower out! It’s more stubborn than my ex.

Removing the Blower Fan Assembly

To remove the blower fan assembly, you need to be thorough and efficient. The blower fan assembly has several working parts that you need to disconnect and remove before proceeding. In this section “Removing the Blower Fan Assembly” of the article “How to Clean Furnace Blower”, we will guide you through some sub-sections such as “Disconnect the Blower Motor Wires”, “Loosen the Blower Wheel Clamp”, “Remove the Blower Wheel”, “Remove the Squirrel Cage Blower Fan” to solve your concern on cleaning the blower fan assembly.

Disconnect the Blower Motor Wires

Disconnecting the blower motor wires without harming them is essential to separate the blower fan assembly. Here’s a 6-step guide to do it:

  1. Switch off all power and take out the negative battery cable.
  2. Locate the wiring harness connected to the blower motor.
  3. Either with your hand or pliers, pull the connector off.
  4. Unscrew retaining nuts or screws, then carefully take it out.
  5. Label each wire with a tape or sticker to remember the motor position.
  6. Gently twist and pull each wire housing off its spade terminal by hand or pliers if needed.

Inspect each wire for insulation damage and corrosion before pulling them out. Remember that unplugging wires from motors may come with varying difficulties. Prioritize safety measures when dealing with electrical components.

My experience taught me to always check for safety before starting repair work. Loosening the blower wheel clamp takes effort, but it is worth it for better air circulation.

Loosen the Blower Wheel Clamp

To get the blower fan assembly out, one needs to loosen the clamp keeping it in place. Here’s a 6-step guide to do so:

  1. Unplug the power supply.
  2. Take away any screws or fasteners that are holding the access panel.
  3. Find the blower fan assembly and figure out the clamp.
  4. Use pliers or a screwdriver to loosen and release the clamp.
  5. Gently pull out the blower wheel while making sure all wiring is disconnected.
  6. Now the blower fan assembly should be free to remove.

It’s important to note that certain makers may need special tools or different steps when fixing HVAC equipment.

Also, per HVAC School, it’s crucial to inspect all components carefully to stop any harm during repairs. Say goodbye to your blower wheel – they’ll never spin again after this process!

Remove the Blower Wheel

Remove the blower wheel for dismantling the blower fan assembly. Here’s how:

1Disconnect the HVAC unit’s power supply.
2Unscrew the blower housing cover
3Detach motor wires and move them aside.
4Locate the set screw that holds the wheel onto its shaft. Loosen, then slide off the wheel.
5Check the blades and shaft for damage and replace them if needed.

Remember! A damaged wheel can cause imbalance, leading to expensive repairs.

Pro-Tip: Before attempting to repair or remove any fan component, ensure no power supply and follow manufacturer instructions for safe handling.

Time to send off the blower fan – it’s served its time, so kick it out like a pesky houseguest!

Remove the Squirrel Cage Blower Fan

Removing the Blower Fan Assembly from an HVAC unit doesn’t have to be hard. To do it, you’ll need to take apart the Squirrel Cage Blower Fan. Here’s a 4-step guide:

  1. Disconnect the power supply: Switch off your system and disconnect the power.
  2. Remove Cover Plate: Unscrew the plate that protects the blower.
  3. Unfasten Motor Mount Bolts: Use a wrench to remove the bolts. They might be attached with screws or clips, so you might need a unique tool.
  4. Pull Out Motor Shaft: Gently pull out the motor shaft to separate the blower assembly from the system.

Handle fragile parts carefully. Damage or mishandling can reduce efficiency and functionality.

You need basic knowledge and skills to do DIY maintenance on HVAC systems. It requires an understanding of its mechanics and potential hazards.

Legend has it, people named it ‘Squirrel Cage’ because it looks like a hamster wheel in action, making similar sounds when it operates. Lastly, don’t forget to clean the Blower Fan Assembly – because who doesn’t love getting up close and personal with dust and grime?

Cleaning the Blower Fan Assembly

To clean the blower fan assembly with the sub-sections – Remove Debris and Dust, Use a Damp Cloth to Clean the Motor Housing and Fan blade. Clean the Squirrel Cage Blower fan and the Evaporator Coil and Air Handler Unit. In this section, you will learn how to perform a thorough cleaning of the blower fan assembly to improve the efficiency and air output of your HVAC system. These simple steps can help you achieve a cleaner and healthier home environment while also reducing the need for costly furnace repairs.

Remove Debris and Dust

To keep your blower fan assembly functioning, you must remove buildup and dirt. Here’s how:

1. Turn off electricity to the system for safety.
2. Use gloves, a brush, or a vacuum with an extended attachment to remove any obstructions near the unit.
3. Use a soft-bristled brush to clear out remaining debris and dust from the fan blades.
4. Have a professional HVAC technician inspect your system regularly.

Did you know? Dirty components in HVAC systems use up to 15% of energy in commercial buildings worldwide. Cleaning your fan is easy – just dampen a cloth to wipe away the grime and enjoy a cool breeze!

Use a Damp Cloth to Clean the Motor Housing and Fan Blade

For effective cleaning of the motor housing and fan blade, follow these steps:

  1. Disconnect power supply for safety.
  2. Gently remove any dust or debris with a soft brush or vacuum.
  3. Wet a cloth in water, wring it out, and wipe off dirt and grease.
  4. Wait for surfaces to dry before plugging power back in.

Avoid too much moisture. Harsh chemicals can be harmful. Wipe surfaces monthly and use covers to protect from contaminants. This will help you extend the life of your equipment and keep it running efficiently. Clean the squirrel cage blower fan too – no rodents allowed!

Clean the Squirrel Cage Blower Fan

Maintenance of the Blower Fan Assembly requires a clean Squirrel Cage. Dirt and debris can cause the fan to not work correctly, leading to overheating and other issues. Follow this 4-Step Guide to effectively clean the Squirrel Cage Blower Fan.

  1. Turn off power. The power should be off before any cleaning or maintenance.
  2. Locate the Squirrel Cage. Find where the Fan is placed – inside or outside.
  3. Remove the Cage. Use a screwdriver or wrench. Wipe with a damp cloth.
  4. Clean tightly packed debris. Use a toothbrush or special cleaner. Don’t use water – it can damage electrical parts.

Be careful not to use harsh chemicals or brush too hard – this may cause damage. Cleaning should be done every three months to avoid clogging. Regular monitoring will help save resources and energy.

To prevent emergency repairs, service the Heating Ventilation Air Conditioning (HVAC) Unit every six months. A well-maintained system gives healthier indoor living, and peace of mind. Start regular service now! Then move on to the Evaporator Coil and Air Handler Unit.

Clean the Evaporator Coil and Air Handler Unit

Cleaning the evaporator coil and air handler is key to an efficient HVAC system. Keep them clear of dirt, dust, and debris. Here’s how:

  1. Cut the power: First, switch off the power supply. It’s important for safety.
  2. Clear debris: Take away any leaves or twigs from the air handler. Then, use a vacuum or brush to get rid of dirt on the outside and inside.
  3. Clean the evaporator: Open up the access panel. Clean it with a soft brush. Use a commercially available coil cleaner for deep cleaning.
  4. Put it back together: After cleaning, put it all back together and turn on the power. Don’t forget to throw away dirty filters!

Note: Cleaning regularly stops bacteria growth, which can cause bad smells, allergies, and breathing problems.

For maintenance:

  • Have regular professional maintenance checks.
  • Check condensation levels near each part.
  • Check if thermostat settings match room temperature.

These steps save energy and make your HVAC system last longer.

Reassembling the Blower Fan Assembly

To reassemble the blower fan assembly after cleaning, you’ll need to put the pieces back together properly. Reinstall the squirrel cage blower fan, blower wheel, and clamp, and reconnect the blower motor wires to ensure everything runs smoothly. In this section, we’ll guide you through each of these steps for a hassle-free furnace repair or HVAC system maintenance.

Reinstall the Squirrel Cage Blower Fan

Disassembling the blower fan is done, now it’s time to reinstall. Here’s the 4-step process to make it effortless:

  1. Make sure the motor shaft is free of debris.
  2. Gently hoist the squirrel cage blower fan and line it up with the motor shaft.
  3. Tighten screws or bolts to secure the blower.
  4. Give your system a test run – check if it’s working as it should.

Warning! Aligning the blower incorrectly can cause serious issues with your HVAC system. So, stretch those muscles and get ready to reinstall!

Reinstall the Blower Wheel and Clamp

Reassemble your blower fan assembly. Here you go!

  • Locate the wheel and ensure it’s clean and free of damage.
  • Position the wheel correctly on the motor shaft.
  • Secure the wheel with the clamp.
  • Tighten the clamp as much as possible.
  • Test the connection by turning on the furnace.

Remember, a proper installation is essential for preventing heating issues. You might need an expert to do this complex task. Incorrect placement can cause deadly accidents or system failures.

Blowers have been around since 1860, when Dutch engineer Reijndert Johannes van der Leeuw invented a chimney flue impeller. Now, they are a crucial component in heating systems worldwide. Reconnecting wires is a delicate job – one wrong move can leave you frustrated.

Reconnect the Blower Motor Wires

To get the blower fan assembly up and running, it is essential to connect the blower motor wires correctly. So stay alert and handle this step with care. Here are 3 ways to do it:

  1. Locate the connector on the motor’s wiring end that fits into a socket in the blower resistor harness.
  2. Match the wires correctly – usually a red wire to a red one and black to black.
  3. Use a needle-nose pliers or your fingers to snap the connector into place.

Don’t rush, as poorly-fitted or loose connections can be hazardous. Your HVAC system may have different wiring patterns, so consult your unit’s manual for guidance.

For extra safety, switch off electrical power from your house panel before starting.

By following these steps, you can finish a major part of the blower fan assembly. Don’t be scared – just do it! Finally, you can show off your DIY skills with a fan-tastic end result!

Final Steps To Clean Furnace Blower

To conclude the cleaning process of the furnace blower, all you need to do is to reinstall the access panel and turn on the power to test the blower fan. It’s easy to forget these crucial final steps, so make sure to follow them carefully!

Reinstall the Access Panel

Reassembling the device is important. Here’s what you gotta do:

1.Align the panel with the computer. Secure all latches and screws.
2.Push down on all edges – make sure it’s snug.
3.No gaps between the panel and the frame.
4.Tighten screws – be careful not to strip or damage any threads.
5.Have a final look for any loose parts.
6.Test functionality before you leave your workstation.

The Access Panel needs to be securely in place. Otherwise, dust can build up, fans can be too loud, or components can malfunction.

Double-check all steps before finishing. If you spot something wrong, talk to a qualified technician right away.

Keep in mind: taking care now prevents expensive repairs later. Don’t attempt amateur solutions – only certified technicians are reliable.

Turn on the Power and Test the Blower Fan

It’s time to test the blower fan. Do this in steps. First, turn on the power switch. Then, head to the control panel and turn on the power supply. Check connections are secure. Increase the thermostat setting until you hear a click. Listen for any strange noises or vibrations.

Remember to make sure there’s enough lubrication in the motor bearings. Also, clean or replace all filters. Doing this will make everything work without any issues.

Take care of your tools. One tradesman once forgot his pliers. He realized his mistake and vowed to never leave without them. So, he bought a tool belt and adjusted it for his equipment. Now, he never loses sight of his tools! They help him get every job done quickly and efficiently.


It’s essential to know the importance of cleaning furnace blower assemblies and fan blades. Neglected blower fans can decrease the efficiency of HVAC systems. Cleaning them regularly boosts airflow, and saves money in the long run.

First, take safety measures. Then, disassemble the blower assembly. Wipe dirt and debris off with a brush or damp cloth. Pay close attention to the squirrel cage wheel or blower wheel. Also, examine balance weights or wire connections for damage.

Never use water on wires, bearings, or motor housing. It can cause rust or short circuits in the system. Use a vacuum to find hidden debris in hard-to-reach areas.

Afterwards, put the blower fan back together. Make sure each part is secure and then turn on your HVAC system. Check if it works properly without making weird noises or shaking.

Regular maintenance of your air handler unit is important. It keeps air output high and reduces mold and bacteria growth. To sum it up, taking care of furnace blower assemblies will prolong farm equipment, and improve indoor air quality at home.

About the author

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