Kohler Generator Code 24 Error Code Explained: Meaning, Causes & Fixes

 

Understanding Generator Error Code 24

 

When your generator displays error Code 24, it means there is an issue known as a "Loss of Speed Sensing" or "RPM Sensor Fault." In simple words, the generator’s system cannot properly detect or read the engine's speed (measured in RPM, or revolutions per minute). This problem causes the safety computers inside the generator to shut it down or prevent it from running, to avoid possible damage. This error is common in both standby and portable generators and signals that a key component which monitors the engine's speed has either failed, come loose, or is getting incorrect information.

 

What Causes a Code 24 Error on Your Generator?

 

There are several reasons why a generator in St Louis homes or businesses, as well as those in Nashville, might display this error:

• Faulty or Disconnected RPM Sensor: Most generators have a sensor to monitor how fast the engine is spinning. If this small sensor is dirty, worn out, disconnected, or physically damaged, the generator can’t read the engine speed and will show Error Code 24.
• Wiring Problems: The wires and connectors that link the sensor to the main control board sometimes come loose, get corroded, or damaged by mice or weather elements. Any break or bad connection interrupts the signal, triggering the error.
• Control Board Issues: If the generator's main computer (known as the control board) malfunctions, it may incorrectly detect engine speed, resulting in the error code even if the sensor itself is fine.
• Magnetic Pickup Malfunction: Some larger generators, especially in commercial settings in St Louis or Nashville, use a magnetic pickup device rather than a typical sensor. If this unit fails, it cannot “sense” engine rotation.
• Mechanical Engine Trouble: In rare cases, the error can happen if there is an actual mechanical problem in the engine—such as broken belts or faulty parts that affect normal spinning motion.

 

What Does This Mean for Homeowners and Business Owners?

 

If your generator in St Louis or Nashville throws a Code 24 error, it will either not run at all or shut off shortly after starting. The system does this for your safety—to prevent engine damage, generator overheating, or power delivery issues to your building. It also means your backup power source may not be available during an outage, so prompt attention is very important.

 

What Should You Do If You See Error Code 24?

 

Here’s what you should do if your generator is showing this code:

• Do Not Force the Generator to Run: Trying to repeatedly restart the system can cause more damage. The safety shutdown is for protection.
• Locate the Generator Manual: Check your specific model’s user manual for any information or troubleshooting related to Error 24. Some may list the location of the speed sensor or describe how to reset alarms.
• Check Basic Connections (If Comfortable): If you feel safe and knowledgeable, inspect the visible wires and connectors from the engine area to the control panel, looking for loose plugs, debris, or obvious damage. Never open up the electrical control panel unless you are trained.
• Call a Trained Technician: This is the most critical step. Because Error 24 involves engine management and sensor systems, a professional technician with generator experience should inspect and repair the problem. Companies like Hoffman Brothers, serving both St Louis and Nashville, are equipped to quickly diagnose and fix issues like this, ensuring your generator returns to safe, reliable operation. Qualified experts have the right tools to check sensors, wiring, magnets, and control boards safely.
• Ask for Preventive Maintenance: Regular maintenance by professionals drastically reduces the chance of errors like Code 24. They clean, check, and test all sensors, wires, and controls as part of their service visit.

 

How Do Experts Fix Error Code 24?

 

When a skilled technician is called for a Code 24 error—whether to a residential home in St Louis or a business in Nashville—they usually follow these steps:

• Use diagnostic equipment to test the speed/RPM sensor and magnetic pickup for proper signal.
• Visually inspect all wiring, looking for corrosion, damage, or loose plugs at the engine and controller.
• Check if the sensor mounting is correct and hasn’t moved out of position due to vibrations.
• Test the control board to make sure it is recognizing the sensor and did not suffer a failure.
• Clean or replace parts as necessary.
• Clear and reset all codes with the proper procedure, ensuring the generator starts and runs as designed.

 

In Summary: What Code 24 Means and Why It Matters

 

Error Code 24 on your generator is a safety alert telling you the system cannot track how fast the engine is spinning—often due to a sensor or wiring issue. Don’t ignore this code. If you see it, pause operation and contact an expert with experience in generator diagnosis and repair. For anyone in the St Louis or Nashville areas, having your generator regularly maintained will both prevent and quickly resolve this sort of error, protecting your power supply and equipment for the future.