Common Generator Problems and How to Troubleshoot Them Dec 21, 2025

For homeowners and businesses alike, generators are crucial tools to ensure a continuous power supply, especially during unforeseen outages. At The Generator Guy, we understand the importance of having a reliable backup power solution. However, like any mechanical system, generators can encounter problems. Here, we will discuss common generator issues and how you can troubleshoot them effectively.

One of the most prevalent issues with generators is a dead battery. A generator that won't start is often due to a discharged or faulty battery. This can be caused by a variety of factors, including poor connections, sulfation, or extreme temperatures. To troubleshoot, first check the battery connections to ensure that they are tight and free of corrosion. If the connections are secure, use a multimeter to test the battery voltage. A reading below 12 volts indicates the battery may need charging or replacement.

Another common problem is insufficient fuel supply. Generators require an adequate fuel level for operation, and a low or empty tank can prevent the generator from starting. Before jumping to conclusions, always verify the fuel level. Additionally, examine the fuel lines for any leaks or blockages that could obstruct fuel flow. If you detect a fuel leak, it is crucial to have it repaired by a professional immediately to avoid safety hazards.

Generators are also notorious for developing oil level issues, which can trigger shutdowns or performance problems. Low oil levels can significantly harm the engine, so regularly check and maintain appropriate oil levels. Refer to the manufacturer's guide for correct oil type and change intervals. If your generator abruptly stops or fails to start, an oil level reset might be needed after the issue has been addressed.

A dirty air filter can lead to a decrease in performance or even complete shutdown. Over time, the filter accumulates dirt and debris, obstructing airflow. Regularly inspect and clean the air filter according to the generator’s maintenance schedule. If cleaning doesn’t restore airflow, replace the air filter with a new one to ensure optimal generator operation.

Voltage regulation problems are another issue that can affect the performance of your generator. This often stems from worn-out voltage regulator components or incorrect calibration. Fluctuating power can damage sensitive appliances, so it is essential to address this problem promptly. Consult your generator’s manual for instructions on adjusting the voltage settings. If the issue persists, seek assistance from a certified electrician.

Finally, one of the most often overlooked issues is stale fuel. Fuel that has been left in the generator for extended periods can lead to poor engine performance. To avoid this, use a fuel stabilizer or drain the fuel if the generator will not be in use for a while. If you suspect stale fuel, drain the tank and lines and refill with fresh fuel.

Troubleshooting generator problems can often be handled by following the straightforward steps outlined above. However, if the issue persists or if you are uncomfortable performing the repairs yourself, it is always best to call a professional. The Generator Guy is here to help with any generator troubles you encounter. Ensuring your generator is in top working condition will provide peace of mind and reliability when you need it most. Don’t hesitate to contact us for expert assistance and maintenance advice.