When the power goes out — whether due to extreme weather or an unexpected failure in the grid — there’s nothing quite like the peace of mind that comes from knowing your generator is ready to kick in. Whether it’s a standby generator installed at your home or a commercial backup system, regular maintenance ensures it performs when it matters most. But how often should a generator be serviced? Let’s break it down in simple terms so you’re not left in the dark.
Why Generator Maintenance Is So Important
Generators are more than just machines — they’re the heartbeat of your emergency power system. Whether you rely on natural gas, diesel, or propane, your generator works hard to keep electricity flowing during a power outage. But like any hardworking machine, it experiences wear and tear over time.
Think of your generator as a car. You wouldn’t drive 20,000 miles without changing the oil, checking the coolant, or inspecting the spark plugs, right? The same logic applies here. Skipping routine inspection and maintenance can lead to costly downtime, especially when you need power the most. And if you’re depending on a diesel engine or a complex transfer switch setup, even small issues can turn into big headaches quickly.
How Often Should a Generator Be Serviced?
The general rule of thumb for generator maintenance is every 6 to 12 months. However, the ideal frequency depends on the type of generator you have, how often it runs, and the fuel it uses.
- Standby generators that run on natural gas or propane and kick in during emergencies should be serviced at least once a year.
- Diesel generators used more frequently — such as in commercial settings — may require servicing every 250 hours of operation or biannually, whichever comes first.
- A quick inspection before and after use is key for portable generators, especially those used seasonally.
Routine servicing includes checking and changing the oil, replacing the oil filter and air filter, inspecting the fuel system, verifying the operation of the transfer switch, and testing the battery, voltage, and spark plug. Each component plays a role in ensuring your emergency power system performs under pressure.
Signs Your Generator Needs Immediate Attention
Even if your generator hasn’t hit the recommended service milestone, there are telltale signs that it’s time to call in the pros. If you notice any of the following, don’t wait:
- The engine struggles to start or doesn’t start at all.
- Strange noises or vibrations during operation.
- Fuel or oil leaks around the tank, lines, or pump.
- Irregular power output or voltage fluctuations.
- An illuminated warning light on the control panel.
These symptoms often point to underlying problems with the coolant, switch, air filter, or even the electric starter mechanism. Ignoring them could lead to total system failure during a power outage — a risk no homeowner wants to take.
What’s Included in a Generator Service Appointment?
When SMART Electric, Heating & Air services a generator, the process is anything but basic. Our team performs a thorough inspection of all major systems and components, from the diesel engine or gas motor to the heat dissipation mechanisms and frequency controls. Here’s what a typical appointment covers:
- Oil and filter change: Fresh oil keeps the engine running smoothly and reduces wear.
- Air filter and spark plug replacement: Clean air and a strong spark mean optimal combustion and reliable starts.
- Coolant and fuel system inspection: Whether it’s natural gas, diesel, or propane, we make sure the tank, lines, and pump are leak-free and pressurized correctly.
- Transfer switch and voltage test: The transfer switch must engage and disengage without delay, and voltage levels should remain steady during operation.
- Battery check: The battery is your generator’s lifeline; if it’s weak, the system won’t start when it’s needed most.
Our certified technicians also test the entire emergency power system under simulated outage conditions to ensure there’s no hiccup in performance when real trouble hits.
Protect Your Investment and Your Peace of Mind
Waiting for an emergency to find out your generator isn’t working is not just stressful — it’s avoidable. Routine generator maintenance not only extends the lifespan of your unit but also ensures you stay safe and comfortable during extreme weather or other grid failures. It’s all about being proactive rather than reactive.
At SMART Electric, Heating & Air, we specialize in keeping your backup power system running flawlessly. Whether you need a full-service inspection or ongoing maintenance for a residential or commercial electric generator, we have the experience and tools to get the job done right.
Be SMART About Your Generator!
So, how often should a generator be serviced? The short answer: at least once a year, but more often if it’s in heavy use or running on diesel. Regular servicing ensures everything — from the transfer switch to the spark plug, coolant, and air filter — is ready to go when you need it most. Don’t leave your power supply up to chance, especially when it could mean the difference between comfort and chaos during an outage.
Contact SMART Electric, Heating & Air today to schedule your next generator maintenance appointment — and never worry about losing power again.