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Here's what a full maintenance service on one of these units actually looks like. We drained the old oil - you can see how dark it had gotten - and replaced it with fresh oil. New oil filter, new air filter, new spark plugs. We tested the battery, did a full system inspection, and reset the maintenance settings so the next owner starts with a clean slate.
That old air filter tells a story on its own. It wasn't trashed, which is a good sign. The previous owner had clearly kept up with the generator over the years. But it still needed to come out. Fresh filters, fresh oil, and a properly reset controller are what give you confidence that the system will actually perform when the power goes out.
That's the thing about a whole-home standby generator. It sits quietly beside the house, runs its weekly self-test, and most people never think about it - until a storm knocks out the grid. That's a bad moment to find out the maintenance got skipped. A well-maintained Generac Guardian will kick on automatically and run the house without you lifting a finger. A neglected one might not start at all.
When we wrapped up, the controller was reading READY TO RUN and the unit was back in AUTO mode. That's the goal every time. The new homeowner in Brookhaven is inheriting a generator that has been freshly serviced and is ready to protect the home from day one.