When your Lennox heat pump model SL22KLV displays error code 128, you’re looking at an indoor fan motor failure. This failure affects the system’s performance, leading to discomfort and increased energy bills. You’ll want to power down the heat pump immediately to prevent further damage.
Check the fan motor’s electrical connections, power cord, and circuit breaker. If you’re not sure what to do next, you’ll find the solution to resolving this issue permanently lies in understanding the causes, troubleshooting, and installation procedures ahead.
Important Point
Symptoms and Diagnosis
When your Lennox heat pump malfunctions, it displays an error code to help you identify the problem.
Error code 128 specifically indicates an indoor fan motor failure. You’ll notice the fan motor isn’t working, which affects the overall system’s performance.
The heat pump may not cool or heat your space efficiently, leading to discomfort and increased energy bills.
Check the fan motor for signs of wear and tear, such as unusual noises, overheating, or corrosion.
Verify the fan motor’s electrical connections are secure and not damaged.
Understanding the symptoms and diagnosis will help you pinpoint the issue, allowing you to take corrective action.
Also, Read: Lennox SL22KLV Heat Pump Error Code126: Relay Failure Detected in Control Circuit
Troubleshooting Steps
One crucial step in resolving the indoor fan motor failure indicated by error code 128 is to power down the heat pump immediately. This prevents further damage to the blower motor and other components.
Next, check the power cord and connections for signs of wear or damage, ensuring they’re secure and functioning properly. Verify the circuit breaker or fuse hasn’t tripped or blown.
If you’ve recently changed the air filter, try reinstalling the old one to rule out filter-related issues. Finally, consult your owner’s manual for specific troubleshooting guidance, as the SL22KLV model may have unique requirements.
Causes of the Issue
Now that you’ve taken the necessary steps to troubleshoot and potentially resolve the issue, you’re likely wondering what causes the indoor fan motor failure in the first place.
There are several reasons why your Lennox heat pump’s indoor fan motor fails, leading to error code 128.
- The dual shaft fan motor has bearings that can loosen or bind over time, leading to motor failure and indoor fan motor failure.
- The fan motor bearings can wear out over time, causing the motor to fail and resulting in indoor fan motor failure.
- A defective relay board can prevent the fan motor from working, leading to indoor fan motor failure.
- A burnt-out temperature control thermostat can prevent the fan motor from running, resulting in indoor fan motor failure.
- Loose or corroded connections can also cause the indoor fan motor to fail.
Also, Read: Lennox SL22KLV Heat Pump Error Code127: Outdoor Fan Motor Failure Detected
Replacement and Installation
When replacing a faulty Lennox heat pump, you’ll need to weigh multiple options to verify the new unit meets your specific needs.
You’ll want to consult a motor selection guide to certify the correct motor size and type for your system.
Next, you’ll follow a precise installation procedure to avoid any potential issues or errors.
Replacement Options
You can replace the faulty fan control with a new one, which is a straightforward solution to resolve the error code 128 on your Lennox Heat Pump Model Num: SL22KLV.
This replacement option is easy to install and doesn’t require programming or logic controllers.
- The replacement part is a direct fit for the Lennox Heat Pump Model Num: SL22KLV, designed to resolve the indoor fan motor failure error code 128.
- Installation is easy, setting it at 120 F or as recommended in the instructions, with no programming required for the installation.
- The fan control is designed to work with the existing wiring and connections, making the replacement process straightforward and efficient.
- The replacement fan control is built to last, with a high-quality design and construction that guarantees reliable performance and minimizes the risk of future failures.
- You can purchase the new fan control from cozyparts.com, providing a quick and easy solution to your error code 128 issue.
Motor Selection Guide
Selecting the right motor for your Lennox Heat Pump Model Num: SL22KLV is vital to guarantee error code 128 is resolved and your system operates efficiently.
You’ll need a motor that matches the original specifications to certify proper airflow, and consequently, peak heat pump performance.
When selecting a replacement motor, consider factors such as motor type, horsepower, voltage, and rotation direction.
Certify the new motor has the same mounting configuration and physical dimensions as the original motor.
Verify the motor’s compatibility with your Lennox SL22KLV heat pump system.
Installation Procedure
The Lennox SL22KLV heat pump’s original motor has been removed, and now it’s time to install the replacement motor, guaranteeing proper airflow and peak heat pump performance.
During installation, you’ll need to:
- Mount the new motor securely to the heat pump cabinet, certifying proper alignment
- Connect the motor wires to the circuit board, following the manufacturer’s wiring diagram
- Secure the motor fan blades to the motor shaft, tightening screws firmly
- Plug in the heat pump and test its operation, checking for any unusual noises or vibrations
- Check the system’s air filters, cleaning or replacing them as needed to achieve maximum performance
Also, Read: Lennox SL22KLV Heat Pump Error Code 125: Control Board Malfunction Detected
Additional Information
As the Lennox heat pump’s impact on your indoor climate becomes more pronounced, understanding the underlying causes of error code 128 is crucial. The indoor fan motor failure can lead to reduced airflow, increased energy bills, and potential breakdown of the entire system.
| Symptoms | Causes | Solutions |
|---|---|---|
| Fan not spinning | Worn-out motor bearings | Check and replace motor bearings |
| Unusual noises | Loose or binding motor shaft | Check and tighten motor shaft |
| Not responding to thermostat settings | Electrical issues | Check electrical connections |
| Reduced airflow | Electrical issues | Check electrical connections |
| Increased energy bills | Worn-out motor bearings | Check and replace motor bearings |
Regular maintenance, such as cleaning the fan motor and checking electrical connections, can help prevent indoor fan motor failure and reduce the risk of error code 128.
Identifying Fan Motor Failure
You’ll need to perform a fan motor diagnosis to determine if the motor bearings failure is the root cause of the error code.
During this process, you’ll inspect the motor’s electrical connections and look for signs of overheating or physical damage.
Fan Motor Diagnosis
Diagnosing fan motor failure is crucial to resolving Lennox heat pump issues, and it starts with understanding the fan’s role in system operation.
You need to determine if the fan motor is the root cause of the error code 128 issue.
- Check the fan motor’s electrical connections for signs of wear or corrosion.
- Verify the fan motor’s power supply voltage matches the rated voltage on the motor’s nameplate.
- Look for any blockages or restrictions in the airflow path that could be putting additional stress on the motor.
- Inspect the fan motor’s mounting bracket for signs of vibration or misalignment that could be contributing to the failure.
Motor Bearings Failure
Motor bearings are a critical component of the fan motor, and their failure can be a major contributor to the Lennox heat pump error code 128.
When you suspect motor bearings failure, look for signs like unusual vibrations, noises, or heat emanating from the motor. You may also notice a decrease in airflow or an increase in energy consumption.
To confirm motor bearings failure, perform a visual inspection of the bearings for signs of wear, corrosion, or damage. You can also use specialized tools to detect abnormal bearing vibration or temperature.
If you identify motor bearings failure, replace the fan motor to prevent further damage to your Lennox heat pump system.
Also, Read: Lennox SL22KLV Heat Pump Error Code 124: Insufficient Heating Due to Reversing Valve Issue
Understanding Error Code 128
When your Lennox SL22KLV heat pump displays an error code 128, it’s indicating a specific problem that requires attention.
This error code is related to the indoor fan motor failure, which can be caused by several factors.
- The indoor fan motor bearings can wear out over time, leading to motor failure.
- A loose or binding motor shaft can also cause the motor to fail.
- A defective relay board providing voltage to the motor can also lead to motor failure.
- The fan motor bearings should be replaced if the motor shaft is loose or won’t turn freely.
- The relay board should be replaced if it’s not providing voltage to the fan motor.
Indoor Fan Motor Failure Solution
When you encounter an indoor fan motor failure, you’ll want to pinpoint the root cause of the problem.
Typically, motor failure is caused by issues like worn or damaged bearings, corrosion, or overheating.
You’ll need to replace the faulty motor with a compatible one, ensuring the new unit meets the manufacturer’s specifications.
Motor Failure Causes
Faulty electrical connections or worn-out bearings cause your Lennox heat pump‘s indoor fan motor to malfunction.
This motor failure can be attributed to several factors.
- Overheating, which can be caused by a faulty thermostat or a malfunctioning relay.
- Corrosion, which can be due to moisture accumulation around the motor’s electrical components.
- Overvoltage, which can be the result of a power supply issue or a malfunctioning voltage regulator.
- Improper installation, which can put undue stress on the motor’s mechanical components.
- Age and wear, which can lead to mechanical failure over time.
Replacement Solution
If your Lennox heat pump’s indoor fan motor has failed, you’ll need to replace it to restore proper system operation. This is a critical furnace repair task that requires attention to detail and technical expertise.
| Replacement Option | Cost | Complexity |
|---|---|---|
| OEM Replacement Motor | $500 | High |
| Aftermarket Replacement Motor | $300 | Medium |
| Professional Installation | $1,000 | Low |
| DIY Installation | $0 | High |
| Used Replacement Motor | $400 | Medium |
Remember to choose a replacement motor that matches your heat pump’s model and specifications to guarantee seamless operation and avoid further errors.
Also, Read: Lennox SL22KLV Heat Pump Error Code 123: Insufficient Cooling Due to Evaporator Issues
Resolving the Issue Permanently
Your Lennox heat pump is now displaying a specific error code, and you’ve taken the necessary steps to diagnose and identify the root cause of the issue.
The error code 128 indicates an Indoor Fan Motor Failure, which requires a replacement solution.
To resolve the issue permanently, follow these steps:
- Verify the replacement fan motor is compatible with your SL22KLV model heat pump.
- Guarantee proper installation of the fan motor to prevent future errors.
- Secure all wires and connections to avoid electrical issues.
- Test the heat pump to confirm it’s functioning correctly after the replacement.
- Keep a record of the maintenance for future reference.
Preventing Future Errors
By certifying the replacement fan motor is compatible with your SL22KLV model heat pump, you’ve taken a crucial step in preventing future errors.
Now, focus on maintaining peak system performance to minimize the likelihood of future issues.
Regularly inspect and clean the air filter to prevent dust buildup, which can put unnecessary strain on the fan motor.
Additionally, verify proper refrigerant levels and inspect the condenser coils for signs of damage or blockage.
Also, Read: Lennox SL22KLV Heat Pump Error Code 122: High Pressure Switch Open Detected
Frequently Asked Questions
How Do I Clear My Lennox Error Code?
To clear the error code, you’ll need to identify and resolve the underlying issue, then restart your system. Follow clear instructions from your user manual or online resources to reset the error code and get your unit running smoothly again.
Why Is My Lennox Heat Pump Fan Not Turning?
You’re wondering why your heat pump fan isn’t turning – it’s likely due to Motor Failure, which prevents the fan from spinning, causing reduced airflow and system malfunction; inspect and replace the faulty motor to restore proper operation.
What Is the Code E312 on a Lennox Furnace?
“When it rains, it pours,” and now you’re dealing with a new issue. For furnace troubleshooting, code E312 on your Lennox furnace indicates a faulty pressure switch, which needs prompt attention to avoid safety hazards and guarantee efficient heating.
What Is Code E130 on Lennox?
You’re troubleshooting a Lennox unit displaying code E130, which indicates a faulty or stuck low-pressure switch, preventing proper system operation; you’ll need to inspect and potentially replace it to resolve the error explanation and get your system running efficiently again.
Conclusion
You’ve pinpointed the root cause of your Lennox heat pump’s malfunction – error code 128. Now, it’s time to breathe new life into your system. By replacing the faulty indoor fan motor and ensuring proper installation, you’ll restore the smooth operation of your heat pump.
Remember, a well-maintenance approach will keep your system running at its best, preventing future hiccups and maintaining a comfortable indoor climate.
Leave a Reply