Standby Generator Maintenance: Keeping Your Backup Power Winter-Ready
A standby generator only earns its keep if it starts when you need it. The good news: keeping one winter-ready is straightforward. Here’s what maintenance looks like — and why it matters in Minnesota.
Why maintenance is non-negotiable
Your generator sits idle for months, then is asked to run for days in sub-zero cold. Fuel systems, batteries, and oil all degrade over time. Skipped maintenance is the number-one reason a standby unit fails to start during the exact storm it was bought for.
What the generator does on its own
Most modern standby units run a weekly self-test (exercise cycle) to circulate oil and confirm they’ll start. Hear yours run briefly once a week? That’s normal and good. If it goes silent, that’s a red flag worth a call.
The annual service checklist
Once a year — ideally before winter — a proper generator service covers:
- Oil and filter change
- Air filter and spark plug inspection/replacement
- Battery test — the most common cold-weather failure point
- Coolant check on liquid-cooled units
- Verifying the automatic transfer switch operates correctly
- Checking fuel lines and connections for leaks
- A full test run under load
Between services: what you can do
- Keep the unit clear of snow, leaves, and debris — maintain airflow
- Confirm the weekly exercise still runs
- Watch for warning lights or error codes on the controller
- Keep the area around it clear so a technician (and the exhaust) has room
Get on a maintenance plan
The simplest way to stay covered is a scheduled annual service so you’re never wondering. Three Rivers Electric services all major standby brands across the Twin Cities Metro — Generator-certified, licensed (EA761814), veteran-owned, 5.0★. Schedule a service or call 651-418-1476.
