Standby generator maintenance

Why maintenance matters here

A generator might sit for months and then need to run for days in a row after a storm. That is hard on an engine that has been neglected. Old oil, a weak battery, a dirty air filter or a clogged vent can stop it from starting or make it shut down under load. Service before the stormy months gives you the best odds that it works when the trees come down.

What a service visit usually covers

Exact steps depend on the brand and model, but a typical visit includes:

• Oil and oil filter change as the manufacturer specifies
• Air filter and spark plugs inspected or replaced
• Battery test and terminal cleaning, with replacement when it is weak
• Transfer switch check to confirm it moves the load as it should
• Fuel connections inspected for leaks or damage by a qualified technician
• Controller review for fault codes and exercise schedule
• Enclosure and vents cleared of leaves, nests and debris

How often

Most home standby units need service at least once a year or after a set number of run hours, whichever comes first. After a long outage, a unit may have used up much of its service interval in one stretch, so it is worth booking a check afterward. Your owner's manual lists the schedule for your model.

What you can safely do

Homeowners should leave engine, fuel and electrical work to a qualified technician. There are a few simple, safe habits that help: keep the area around the unit clear of snow, leaves and plantings, glance at the controller for warning lights, and note whether the weekly self-test runs. If you smell gas near the unit, leave the area and call 911 or your gas utility from a safe place.

Service plans

Many installers offer yearly service agreements. Before signing one, ask what is included, whether parts like the battery and filters are covered, and how visits are scheduled. Compare that to paying per visit. For problems between visits, see generator repair.

Questions homeowners ask