Why maintenance decides whether it starts
A generator sits idle for months and then gets asked to work hardest on the coldest night of the year. The usual reasons it fails are simple: a dead starting battery, old oil that thickens in the cold, a clogged air intake, a tripped breaker nobody noticed, or a controller alarm ignored since summer.
Almost all of that is caught by routine checks. This guide covers what owners can do safely and what belongs to a qualified technician.
Standby units get less attention than they should because they are out of sight and run on their own. Portable units get forgotten in the back of the garage. Either way, the habit that matters most is the same: check it before you need it.
A seasonal rhythm
In Edmonton, the calendar more or less sets itself. Do the big service before the snow, keep the unit clear through winter, and look it over after the melt.
- Fall, before the first deep cold: full service, including oil and filters, battery test, cold-weather kit check, and a load test if your plan includes one.
- Winter: keep snow and ice away from intake and exhaust openings and the enclosure lid. Check that the weekly or monthly exercise is running.
- Spring: look for water pooling, debris, rodent nests and frost heave of the pad after melt.
- Summer: trim grass and shrubs back from the enclosure and keep the area clear.
What owners can safely do
- Watch or listen for the scheduled exercise run and note any warning lights.
- Read the controller display or app for alerts and service reminders.
- Keep the enclosure clear of snow, leaves, grass clippings and stored items.
- Check that the generator's main breaker is in the on (auto) position as your installer showed you.
- Keep the area around the unit and its gas line free of damage.
- For portables: check oil level, run it periodically, keep fuel fresh and the battery on a maintainer.
Do not open covers on the transfer switch or the generator's electrical compartment. Standby generators can start automatically at any moment, and transfer switches carry utility power even when the generator is off.
If you are ever unsure whether something is safe to touch, leave it and ask. A quick call costs far less than an injury or a damaged unit.
What a technician does
A proper service visit goes further than an oil change. On a typical home standby unit, the checks cover the parts shown below.
| Item | What is checked |
|---|---|
| Oil and filters | Changed on the manufacturer's schedule or run hours |
| Starting battery | Load tested, terminals cleaned, replaced when weak |
| Cold-weather kit | Battery warmer and oil or block heater working |
| Transfer switch | Operation tested, connections inspected |
| Controller | Fault log reviewed, firmware and exercise settings |
| Gas supply | Regulator, connections and pressure, with a gas fitter where required |
Commercial and institutional generators often have additional testing requirements under the building and fire codes and the applicable CSA standard for emergency power, including documented load testing. Facility managers should confirm the exact schedule with their authority having jurisdiction.
Signs your generator needs attention now
- It did not exercise on schedule, or it ran rough.
- A warning or fault light is on.
- It starts but does not take the house load in an outage.
- The house flickers or loads trip when it is running.
- Oil spots, fuel smell or gas odour near the unit. For gas odour, leave the area and call your gas utility from a safe place.
- The battery is several years old and you do not know when it was last tested.
If you are unsure what your installer set up, generator maintenance can start with a baseline inspection and a written schedule.
Portable generator care
Portable generators need the same attention on a smaller scale. Most of this is owner-friendly work that follows the manual.
- Run it under some load every month or two so seals stay lubricated and you spot problems early.
- Change the oil on the manufacturer's schedule, using a grade suited to cold starts.
- Use fresh fuel with stabilizer, or follow the manual's advice for storing it dry.
- Clean or replace the air filter and check the spark plug.
- Keep electric-start batteries on a maintainer through the winter.
- Inspect the generator cord and the outdoor inlet cover for damage.
If the inlet, interlock or transfer switch looks damaged, or anything trips when you connect, stop and call an electrician rather than trying again.
Keeping records
Keep a simple log: date, run hours, what was done and by whom. It helps technicians spot trends, supports warranty claims with the manufacturer, and for businesses it is the evidence an inspector or insurer will ask for.
If your unit is undersized for what you now run, maintenance will not fix it. See sizing a backup generator for how to check.
Put the pre-winter service in your calendar for September. Bookings fill quickly once the first cold snap arrives.
Common questions
How often should a standby generator be serviced?
At least once a year for most homes, with more frequent checks if it runs a lot. The manufacturer's schedule, based on time and run hours, is the guide.
Should my generator run by itself every week?
Most standby units have a scheduled exercise, often weekly or every two weeks, to keep the engine lubricated and confirm it starts. Your installer sets the schedule.
Does a generator need a block heater in Edmonton?
A cold-weather kit with a battery warmer and oil or block heater is common and recommended by many manufacturers for our climate. Ask about it at installation or the next service.
Can I change the oil myself?
On a portable, yes, following the manual. On a standby unit that can start automatically, it is safer to leave service to a technician who knows how to lock it out properly.
Codes and permit rules change and every building is different. For work on your system, talk to a licensed electrician and your local permit authority.