Standby generators are designed to work quietly in the background, turning on automatically when the power goes out. However, they need regular maintenance to stay dependable. Without it, small technical issues can prevent the generator from running when it’s needed most.
In this article, we’ll look at what proper maintenance involves, how often it should be done, and when it’s best to call a professional.
Why Regular Maintenance Is So Important
Standby generators often go weeks or months without running, but when they’re needed, they have to perform immediately and without error.
Here are the main reasons why maintenance isn’t optional if you expect consistent performance.
Preventing Failures During Power Outages
The worst time to discover that your backup generator isn’t working is during an actual outage. Routine checks catch potential issues, like a weak battery, low oil, or dirty filters, before they lead to failure.
Protecting Your Investment and Extending Lifespan
Standby generators aren’t cheap, and high-end systems like Generac and Kohler need consistent care to function properly.
Regular maintenance can significantly extend the life of your equipment, helping you avoid costly standby generator repair or even full replacement.
What Maintenance Typically Includes
Knowing what to expect from a maintenance visit or what to check yourself can help you stay ahead of potential problems.
Most maintenance tasks are straightforward, but each one plays a role in keeping your generator safe and functional. Here’s a breakdown of what’s usually included.
Key Tasks: Oil Changes, Filter Replacement, Battery Testing
These are the core maintenance tasks that help keep a standby generator running reliably:
Change the engine oil
Like any engine, a generator needs clean oil to function properly. Over time, oil degrades and collects debris, which can cause wear on internal components. Most systems require an oil change every 100–200 hours of use or at least once a year.
Replace the oil and air filters
Filters protect the engine from dust, dirt, and contaminants. A clogged oil filter won’t remove particles effectively, while a blocked air filter can reduce airflow, impact performance, and cause the system to overheat.
Test and inspect the battery
The battery powers the generator’s automatic start system. If the battery is weak or corroded, the generator may not turn on when needed.
Routine checks include:
- Testing the battery’s voltage
- Inspecting for corrosion on terminals
- Cleaning or tightening connections if necessary.
Additional Checks: Spark Plugs, Transfer Switch, and Cleaning
In addition to the core maintenance tasks, these additional checks help keep the system safe, efficient, and ready to respond:
Inspect and replace spark plugs
Spark plugs are responsible for igniting the fuel in the engine. Over time, they can wear down or become fouled, which can lead to poor starting performance or misfires. Replacing them at recommended intervals helps the generator start smoothly and run efficiently.
Check the automatic transfer switch (ATS)
The transfer switch is what tells your generator to start when there’s a power outage and safely routes electricity to your home. It should be inspected to make sure it’s operating correctly and not showing signs of wear, overheating, or loose wiring.
Clean vents, panels, and surrounding areas
Dirt, leaves, and other debris can build up around the generator and block airflow, leading to overheating or unnecessary strain on the system. The unit should be kept clean and free from obstructions, especially around intake and exhaust vents.
DIY vs. Professional Maintenance
Some maintenance tasks are simple enough for homeowners to manage, while others are best left to a trained technician.
Understanding the difference can help you take care of the basics without risking damage or skipping something important.
What Homeowners Can Handle Safely
If you’re handy, you can handle some routine backup generator maintenance yourself. Checking oil levels, inspecting visible parts, and running a monthly self-test are all manageable, but refer to your manufacturer’s manual before starting.
When and Why to Call a Pro
Deeper inspections, like diagnostics, electrical testing, or standby generator repair, should always be left to licensed professionals.
Improper handling can void warranties or create safety risks. At Oregon Generators, our team is trained to service both Generac and Kohler systems with precision.
Service Frequency and Cost Considerations
How often should your generator be serviced? What will it cost? The answers depend on how often it runs, its age, and the conditions it operates in.
How Often Should You Service Your Generator?
Most manufacturers recommend full servicing at least once a year, or after every 200 hours of use. However, if your generator kicks in frequently during storm season or you’ve recently had a power event, it may need earlier attention.
What Impacts the Price of Maintenance?
Whole house generator maintenance cost varies depending on:
- Generator size and model
- Accessibility and location
- Frequency of use
- Replacement parts needed (e.g., filters, spark plugs)
Expect costs to range between $200 and $500 per service call. It’s a small price compared to backup generator repair or losing power during a blackout.
Why Choose Oregon Generators
Generator maintenance is only as good as the team doing the work. At Oregon Generators, we focus on reliable service, clear communication, and long-term support.
Here’s what sets us apart.
Experienced with Various Systems
We know Oregon’s weather and power grid challenges better than anyone. Our certified technicians specialize in Generac standby generator repair, Kohler servicing, and more.
Whether you need routine residential generator maintenance or a full repair, we’ve got your back.
Book Reliable Maintenance and Emergency Repairs
Don’t wait for your system to fail. Schedule your standby generator maintenance with Oregon Generators today. We also offer emergency repair services because outages don’t keep business hours.
Learn more about how to protect your home and your investment on our surge protection guide.
