Guide · 6 min read
DIY or Call a Pro?
An honest breakdown of which element replacements are reasonable homeowner work and which are not. We sell parts, and we would still rather you called somebody than got hurt.
The rule that overrides everything else
If you cannot confidently isolate the circuit and verify it is dead, stop. Water heater and furnace circuits carry enough current to kill, and confidence about that is not something to acquire on the job. In Ontario, much electrical work must legally be carried out by a licensed electrician.
Reasonable DIY for a competent homeowner
Testing an element with a multimeter. Genuinely accessible if you can isolate a circuit safely. It is the highest-value ten minutes in this whole process, because it tells you whether you need a part at all.
Screw-in water heater element replacement. The most commonly DIY-ed job here, and reasonable if you are comfortable draining a tank and working methodically. You need an element wrench, a new gasket, and the discipline to refill the tank completely before restoring power. Dry-firing a copper element destroys it in seconds — it is the classic first-timer mistake.
Kiln element replacement. Well within reach for studio potters, and many do it routinely. Element wire is stiff and awkward, the job takes patience, and the kiln must be unplugged or its circuit isolated. Manufacturers publish good instructions for their own kilns.
Get a professional
Anything hardwired that you cannot isolate confidently. No qualification needed to know this one.
Electric furnace and heat pump heat kits. High current, multiple staged circuits, safety controls that must be correctly reconnected. This is licensed technician territory, and not a good place to learn.
Commercial and three-phase equipment. 480V and 600V three-phase is a different category of danger entirely. Do not.
Bolt-in water heater elements. Fiddlier than screw-in — gasket seating has to be right or the tank leaks, and getting it wrong means water where electricity is.
Anything where the wiring looks wrong. Scorching, melted insulation, corroded terminals, previous repairs that look improvised. That is a warning sign about the whole circuit, not just the element.
Honest cost reasoning
A water heater element is an inexpensive part, and doing it yourself saves a service call. That maths works when the job goes as planned.
It stops working if you crack the tank lining, strip the threads, flood a basement, or destroy the new element by energising it dry. A plumber's call-out is considerably cheaper than a new water heater, and dramatically cheaper than an electrical injury.
Our honest position: if you have done it before, or you are methodical and genuinely comfortable around isolated circuits, a screw-in element is a fair DIY job. If you are reading this to work out whether you are that person, you have your answer — and there is no shame in it.
Ontario specifics
Electrical work in Ontario falls under the Ontario Electrical Safety Code, administered by the ESA. Homeowners may do certain work on their own single-family dwelling, but notification and inspection requirements can apply, and rental and commercial properties have stricter rules. Insurance is a separate consideration: unpermitted electrical work can affect a claim if something goes wrong later.
Check current ESA requirements before starting. They apply regardless of how straightforward the job looks.
We will still help either way
Whether you fit it yourself or hand it to a contractor, we identify the element the same way and confirm the fit before anything ships. Getting the right part matters just as much when a professional is installing it.
Common questions
Do I need a permit to replace a water heater element in Ontario?
Replacing a like-for-like element in your own home is generally treated as maintenance rather than new electrical work, but rules vary by situation and property type, and rental and commercial properties are stricter. Check current ESA guidance for your circumstances rather than relying on a general answer.
What tools do I need for a screw-in water heater element?
A water heater element wrench (a socket that fits the element flange — a standard socket will not), a multimeter, a screwdriver, a garden hose for draining, and a replacement gasket. The gasket is not optional and does not get reused.
How long does a water heater element replacement take?
An hour or two for someone who has done it, with most of that spent draining and refilling the tank rather than on the element itself. Allow considerably longer the first time, and do not start it late in the evening.
Get a quote
Send us your model number or a photo
Most people who contact us do not know their part number, and that is fine. A photo of the rating plate or the old element is enough for us to identify the exact replacement.