Late summer in Northeast Indiana brings some of the most severe weather of the year. Thunderstorms that roll through in August and September can be intense enough to knock out power for hours or days, and those outages happen when temperatures are still high enough to make a home without air conditioning genuinely uncomfortable or dangerous. If you have a standby generator, the time to find out whether it’s ready to run is before the storm, not when the lights go out.
Generator maintenance isn’t something most homeowners think about until they need the generator. That’s exactly the wrong order. A generator that hasn’t been serviced and has been sitting idle since the last outage may fail to start when you need it. Emergency generator repair after a storm, when every technician in the region is busy with similar calls, is significantly more expensive and slower than a planned maintenance visit in August.
Why Late Summer Storms Can Cause Unexpected Power Outages
August and September bring thunderstorm activity that can be severe enough to topple trees and bring down power lines across a wide area. Unlike winter storms, where outages are expected and utilities prepare resources in advance, summer storm outages often happen suddenly and can affect large numbers of homes and businesses simultaneously.
The grid infrastructure in rural Northeast Indiana relies on long transmission lines running through areas with significant tree cover, making it particularly vulnerable to wind and lightning events. Outages that affect multiple circuits can take longer to restore than single-point failures, because utility crews must work across a wider area.
For households with medical equipment that requires electricity, food that would be lost without refrigeration, or members who are vulnerable to heat, an extended summer outage without backup power creates real problems. A properly maintained whole-home generator eliminates those problems entirely.
Signs Your Generator Needs Maintenance
Standby generators run automatic exercise cycles, typically weekly or bi-weekly, to confirm they’ll start and run under load. These exercise cycles don’t replace maintenance, but they do provide an opportunity to observe whether the generator is performing normally.
Signs that a generator needs professional attention include the exercise cycle not completing normally or producing fault codes, visible oil leaks around the engine, coolant that appears low or contaminated, battery voltage that reads low on the generator’s display, and any unusual sounds during operation, such as knocking, excessive vibration, or rough running.
A generator that hasn’t had professional service in more than 12 months should be considered overdue, regardless of whether it shows obvious symptoms. Standby generators have manufacturer-specified maintenance intervals based on operating hours and calendar time, and following these intervals ensures reliability when the equipment is needed.
Essential Generator Maintenance Tasks
Comprehensive standby generator maintenance covers the engine, the generator end, electrical connections, and the transfer switch that connects the generator to the home’s electrical system.
An oil and filter change is the most fundamental engine maintenance task. Generator engines accumulate operating hours during both exercise cycles and actual outage operation. Over time, oil degradation and contamination reduce the protection it provides. The oil change interval varies by manufacturer and engine type but typically falls in the range of 100 to 200 operating hours or annually, whichever comes first.
Air filter inspection and replacement keep the engine’s air intake free of debris that reduces efficiency and can damage the engine. Generators located near vegetation accumulate debris in the air filter more quickly than those in clean environments.
Spark plug inspection and replacement on gasoline-powered generators, and equivalent service on diesel generators ensure reliable ignition at startup and smooth operation during extended runs.
Battery testing and maintenance are critical because the battery starts the generator when utility power fails. A battery that tests weak or has a low state of charge may fail to start the generator during an actual outage. Battery testing measures actual cranking capacity, not just voltage, to confirm the battery can deliver the power needed for a cold start.
Transfer switch testing confirms that the automatic transfer switch correctly detects a utility power failure, transfers the load to the generator, and returns the load to utility power when power is restored. A transfer switch that fails to operate correctly can leave the generator running while the home remains on utility power, or vice versa.
Coolant check and replacement for liquid-cooled generators maintain the cooling system that prevents engine overheating during extended operation. Coolant degrades over time and should be tested and replaced at manufacturer-specified intervals.
Load testing runs the generator under actual load conditions to verify it can handle the electrical demand it will be asked to supply during an outage. Exercise cycles typically run the generator at light load. A full load test confirms performance under the conditions that actually matter.
How Often Should Backup Generators Be Serviced?
Most standby generator manufacturers specify annual professional service as the minimum maintenance interval for residential generators. Generators that accumulate significant operating hours, either through frequent power outages or extended exercise cycles, may require more frequent service.
Annual maintenance before storm season is the logical timing for Northeast Indiana because it ensures the generator is in the best possible condition heading into the months with the highest likelihood of outages. Discovering a maintenance need in August, when there’s time to address it before the next storm, is far better than discovering it during or after a storm.
Beyond annual professional service, monthly observation of the exercise cycle and periodic inspection of the generator exterior for oil leaks, debris accumulation, and obvious damage keep problems from going unnoticed between professional visits.
Common Generator Problems That Prevent Startup
Several specific failure modes prevent generators from starting when needed.
A dead or weak battery is the most common reason a standby generator fails to start. Batteries in outdoor-mounted generators are exposed to temperature extremes that accelerate degradation. A battery that tested fine during the last maintenance visit may have deteriorated enough to fail a cold start twelve months later.
Stale fuel in gasoline generators that haven’t been operated for some time can cause starting difficulty or rough running. Fuel stabilizer added when the tank is filled, and a regular exercise cycle that turns the fuel over reduces this risk.
Low-oil-pressure shutdown prevents the engine from starting or causes it to shut down shortly after starting when the oil level is low or the oil pressure sensors detect a problem. A low oil level is preventable with regular oil level checks between maintenance visits.
A faulty transfer switch that fails to properly signal the generator to start leaves the home without power, even when the generator is otherwise functional. Transfer switch testing during annual maintenance identifies this failure mode.
Coolant system problems, including low coolant levels, coolant leaks, or thermostat failures, can cause the engine to overheat and shut down during operation or prevent startup when a high-temperature fault has already been registered.
Why Professional Generator Maintenance Is Worth It
The economics of generator maintenance are straightforward when compared to the alternatives.
A professional annual maintenance visit costs significantly less than a service call during or immediately after a storm, when emergency rates apply and technicians may not be available for days. It costs far less than generator repair for problems that escalate from neglected maintenance issues to actual component failures. And it costs a tiny fraction of replacing a generator that has been run to failure due to inadequate maintenance.
Beyond cost, professional maintenance provides documentation that supports warranty claims, confirms that the generator will perform as expected during an outage, and gives the homeowner confidence based on evidence rather than hope.
Don’t Let a Storm Reveal Your Generator Isn’t Ready
J.O. Mory services, installs, and repairs standby generators across Northeast Indiana as part of their comprehensive electrical and mechanical services. Their licensed technicians perform manufacturer-recommended maintenance on all major generator brands, conduct full-load testing, and identify developing problems before they lead to outages.
J.O. Mory has been the trusted services provider in Northeast Indiana since 1892. When a storm takes out the power, their customers know their generators are ready because they’ve been properly maintained by a team with the experience and equipment to do it right.
Get in touch with J.O. Mory today to schedule generator maintenance before storm season arrives.
