A spring electrical walkthrough is one of the better uses of an early-April Saturday morning. Most of it is observation, a flashlight, and a few button presses - genuinely homeowner-level work. The other piece is the items that should not happen without a 309A holding the screwdriver - things where the right next step is a phone call, not a YouTube tutorial. This post separates the two clearly so you can do the parts you should do and book the parts you should not.
What you can do yourself - exterior
Start outside, with the main on (this is just looking).
Walk the service entrance
Stand back from the building and look up at the service mast. Plumb? Bent? Rust streaks down the wall? Then walk closer:
- Weatherhead. The mushroom-shaped fitting at the top. Insulation intact on the conductors? Plastic body crack-free? Any chewed work that looks like squirrels?
- Service drop. The three conductors from the utility pole. Any tree branch resting on them? Any branch that grew into them since fall? Any conductor visibly closer to its neighbours than the spacer should allow?
- Meter base. Rust streaks at the bottom seam? Any visible scorching or arc-blackening on the meter face? Glass intact?
None of these require touching anything. All of them flag issues worth a call before they get worse.
Walk every outdoor receptacle
Open every in-use cover. Look inside.
- Water staining or visible water inside the box - cover has been leaking all winter
- Corrosion on the receptacle face - device is end-of-life
- Ice or debris in the receptacle slots - device is end-of-life
- Loose or missing cover screws - close the cover, note it for spring fix
Press TEST on each outdoor GFCI. The button should pop with an audible click. Press RESET. Plug a lamp or phone charger in to verify it is live. A GFCI that will not test or reset is replaced.
Outdoor lighting fixtures
Walk every exterior fixture. Look for:
- Cracked lenses or housings
- Rust on aluminum or steel fixtures - structural rust through the mounting is end-of-life
- Loose mounting
- Bulbs not working - simple replacement first, but if a new bulb does not light, that is a circuit or fixture call
This is mostly a fixture-by-fixture visual. The fix for most of what you find is replacement, often a homeowner-level swap on like-for-like fixtures, sometimes a call if the original install used a non-standard mounting.
What you can do yourself - interior
Press TEST on every interior GFCI
Bathroom, kitchen counters, garage, laundry, unfinished basement. Press TEST, watch the protected receptacle go dead (use a lamp or phone charger to verify), press RESET. Any GFCI that fails is replaced.
Press TEST on AFCI breakers
If your panel has arc-fault breakers (usually serving bedrooms in newer or rewired homes), each breaker has a TEST button on the face. Press it. The breaker should snap to a tripped position. Reset. A breaker that fails to test is a panel call.
Test smoke and CO alarms
Press and hold the test button on every alarm. The horn should sound loud. Check the manufacture date on the back of each unit. Smoke alarms expire at 10 years; CO alarms at 7-10 years. Any unit past expiration is replaced.
Walk every receptacle in the house
Plug a lamp or phone charger into every receptacle in the house. The point is not to test electrically - it is to identify any receptacle that is dead, intermittent, or warm to the touch. Touch every receptacle face with the back of your hand. Warm is normal under load; hot is not. Any hot receptacle is a call.
Look at the panel face
With the panel cover ON (do not open it):
- Any breaker handle stuck mid-position - that is a tripped breaker. Try to reset it. If it will not reset, leave it off and call.
- Any discoloration on the dead front near a specific breaker - heat damage behind
- Any humming or buzzing audible at the panel - panel should be silent
- Does the panel legend still match the rooms? Most do not by year five
Walk the basement and any unfinished spaces
Flashlight in hand:
- Junction boxes - every box should have a cover
- Cable - properly stapled, no obvious damage, no chewed jacket
- Lights - working, fixtures secure
- Smell - any acrid plastic smell anywhere is a stop-and-call
What needs a 309A
Some items are call-an-electrician work. Not because they are mysterious or arcane - because the consequences of getting them wrong are not proportional to the savings.
Opening the panel
The dead front cover comes off only for a qualified electrician. Live bus bars are inches behind it. Working in an energized panel is a 309A's job; for a homeowner it is an unnecessary risk.
Replacing breakers
Manufacturers list compatible breakers for each panel. Mixing brands (a Siemens breaker in an Eaton panel, for example) is not just non-listed - it is a connection that the bus is not designed for and that the inspector will fail. The fix is using the right part, which is electrician work.
Re-terminating any device
If a receptacle, switch, or fixture is loose, hot, or arcing, the right answer is not "tighten the screws and try again." A loose neutral is a fire mechanism. The connection has to be inspected for damage, the conductor stripped fresh, the device replaced if its terminals are arc-pitted. That is 309A work.
Any work that requires an ESA permit
New circuits, service upgrades, panel changes, EV charger installs, hot tub installs, sub-panels, knob-and-tube remediation. The full list is in our ESA permit and inspection process post. None of this is homeowner work in Ontario.
Thermal scans of the panel under load
The infrared scan that finds loose connections before they fail is electrician work. The camera is expensive, the interpretation matters, and the load profile during the scan has to be representative of real use.
The gray zone
A few items live in a gray zone where some homeowners reasonably do them and others reasonably do not.
- Replacing a light fixture on an existing box - allowed in Ontario, doable by a careful homeowner, and a routine call when the homeowner does not want to do it. The right answer is "depends on the homeowner."
- Replacing a receptacle or switch on an existing box - same. Allowed, doable, often done by a 309A because the homeowner is not sure.
- Replacing a ceiling fan with new fan-rated box - if the box has to change to a fan-rated support box, that crosses into work most homeowners should not do. If the fan-rated box is already there, it is a fixture swap.
- Adding a smart thermostat - usually homeowner-friendly if a C-wire is present; can require a transformer add or other wiring work if not. Often a call once the homeowner sees what is in the wall.
If you are not sure, our standard answer is: take a photo of what you are looking at and send it to us. Photo plus a one-line description usually gets you a straight answer back the same day - whether it is a 10-minute call to book or a homeowner job you can knock out this weekend.
The findings that bump up to "book now"
- GFCI or AFCI that fails to test or reset
- A receptacle that is warm or hot
- Burning smell anywhere
- Visible arc damage, soot, or discoloration on a device or panel
- Service mast that is visibly out of plumb
- Rust streaks or water at the meter base
- Panel that hums or buzzes
- Lights flickering when an appliance starts (possible bad neutral)
- Smoke or CO alarm past 10 years from manufacture
- Any extension cord still in service indoors as permanent wiring
When the inspection itself is worth a 309A visit
If the home is being put on the market, has been in the family for 30+ years without any electrical work, has had a recent insurance ask, or just makes you uneasy, a paid 309A inspection is worth the flat fee. The visit covers everything in this post plus the panel-cover-off thermal and torque check, the load-calc review, and a documented findings letter. Common pairs: a spring inspection often surfaces a service upgrade conversation, an EV-readiness conversation, or a panel-replacement need that the homeowner had not gotten around to.
When to call us
If your DIY walk-through surfaced anything from the bump-up list, or you want a documented inspection rather than the homeowner version, we run spring electrical inspections across Hamilton, Burlington, Dundas, Waterdown, Ancaster, Stoney Creek, Oakville, and throughout Muskoka. Request a spring inspection and we will get you on the schedule.