Troubleshooting and Fixing a Goodman Furnace Inducer Motor That Won’t Turn On
The inducer motor in a Goodman furnace plays a crucial role in ensuring proper venting of combustion gases. When the inducer motor fails to turn on, it can disrupt your furnace’s operation and cause heating issues. This article explores common reasons why a Goodman furnace inducer motor might not start, how to diagnose the problem, and what steps to take for repair or replacement. Whether you are a homeowner looking to understand the issue or a technician seeking detailed troubleshooting guidance, this comprehensive analysis helps you address the problem efficiently.
| Common Causes | Symptoms | Possible Solutions |
|---|---|---|
| Electrical issues (power, wiring, capacitor) | Inducer motor doesn’t spin, furnace won’t ignite | Check breaker/fuse, inspect wiring, replace capacitor |
| Faulty pressure switch | Inducer motor stops during startup, error codes | Test & replace pressure switch if faulty |
| Burnt-out inducer motor or capacitor | Motor hums but does not spin | Replace inducer motor or capacitor |
| Control board malfunctions | Inconsistent inducer motor operation | Examine & replace furnace control board |
Role of the Inducer Motor in Goodman Furnaces
The inducer motor sets the stage for safe furnace operation by creating the draft needed to expel combustion gases. It activates before ignition to ventilate the combustion chamber. If the inducer motor fails to turn on, the furnace typically will not proceed with heating, as safety mechanisms prevent operation under unsafe venting conditions.
In Goodman furnaces, this motor ensures combustion gases exit through the vent pipe rather than accumulating inside your home, protecting both equipment and occupants. Recognizing and resolving inducer motor issues is vital to maintain system reliability and efficiency.
Common Reasons Why a Goodman Furnace Inducer Motor Won’t Turn On
Power Supply and Electrical Issues
A frequent cause behind a non-starting inducer motor is disrupted power supply. This might be due to a tripped circuit breaker, blown fuse, loose wiring connections, or a faulty transformer. Without proper voltage, the inducer motor cannot operate.
Bad Capacitor
The capacitor helps the inducer motor start and run smoothly. A failed or weak capacitor can cause the motor to hum but not start turning. Capacitor failure is common due to age or electrical surges.
Pressure Switch Failure
The pressure switch ensures the inducer motor is correctly ventilating before ignition. If the switch is malfunctioning or clogged, it won’t close the circuit to allow the motor to start. This safety switch prevents the induction motor from running under unsafe pressure levels.
Inducer Motor Malfunction
Mechanical wear and tear, dirt accumulation, or seized bearings can cause the inducer motor to fail. Sometimes, the motor windings burn out, or internal components wear down, leading to a complete motor failure.
Faulty Furnace Control Board
The furnace control board governs the inducer motor’s operation by sending the startup signal. A defective control board can result in intermittent or no power to the inducer motor, hindering furnace startup.
How to Diagnose a Goodman Furnace Inducer Motor Not Turning On
Step 1: Check Electrical Supply
Ensure the furnace has power by inspecting breakers and fuses. Use a multimeter to verify that the inducer motor is receiving the proper voltage at the terminals. Electrical continuity and presence of correct voltage are prerequisites for motor operation.
Step 2: Inspect the Capacitor
Visually examine the capacitor for bulges or leaks. Test capacitor capacitance with a multimeter capable of capacitance measurement. Replace it if readings fall outside manufacturer specifications.
Step 3: Test the Pressure Switch
Disconnect vacuum tubes connected to the pressure switch and use a multimeter to check for continuity. When the inducer motor runs, the pressure switch should close, completing the circuit.
Step 4: Assess the Inducer Motor
Listen for humming sounds indicating a motor receiving power but not spinning. Manually spin the fan blades to free stuck parts. If the motor doesn’t run freely or shows signs of damage, it likely requires replacement.
Step 5: Examine Control Board Signals
Inspect the control board for obvious signs of damage like burnt components or loose connectors. Use wiring diagrams to verify if the control board sends proper signals to the inducer motor during startup sequences.
Solutions and Repairs for Goodman Furnace Inducer Motor Issues
Reset Circuit Breakers and Replace Fuses
If a breaker is tripped or fuse blown, resetting or replacing them can restore power to the inducer motor quickly.
Capacitor Replacement
Replacing a faulty capacitor is a relatively inexpensive repair. Match the capacitance rating exactly to ensure proper motor startup.
Pressure Switch Cleaning or Replacement
Remove any obstructions in pressure tubes and test switch functionality. Replace the pressure switch if it does not close during inducer operation.
Inducer Motor Replacement
For motors with burned-out windings or seized bearings, replacement is necessary. Choose a motor model compatible with your Goodman furnace to ensure proper fit and performance.
Control Board Repair or Replacement
If the control board is confirmed faulty, replacing it often restores full furnace functionality, including inducer motor operation.
Maintenance Tips to Prevent Inducer Motor Failure
- Regularly inspect and clean the inducer motor and fan blades to prevent dirt buildup that causes strain on the motor.
- Check and replace the capacitor during annual furnace maintenance visits.
- Verify the pressure switch operation and clean venting pathways to avoid false pressure readings.
- Ensure electrical connections are secure and wiring insulation is intact.
- Schedule professional furnace tune-ups at least once a year to catch early signs of inducer motor wear or other furnace problems.
When to Call a Professional HVAC Technician
While some checks and basic repairs can be done by savvy homeowners, replacing the inducer motor, control board, or pressure switch may require professional skills. Diagnosing electrical faults and handling furnace control board components should be left to licensed HVAC technicians to ensure safety and compliance with local codes. If troubleshooting steps don’t restore inducer motor operation, calling a professional avoids costly mistakes and longer downtime.