The Most Common Causes
Ranked by how often we see each one. The diagnostic that actually matters isn’t a guess from a list — it’s a tech listening to your machine, looking at the install, and checking the right things in the right order. But it’s useful to know what’s on the menu.
Bake Element Burned Out
The big heating element at the bottom of the oven cavity. Over time the metal sheath cracks and the element fails — sometimes you can see the damage (broken section, blistered spot, sagging), sometimes it’s an internal break with no visible sign. Continuity test confirms in seconds. The most common electric oven repair we see in Edmonton homes by a wide margin.
Blown Thermal Fuse
A safety device wired into the heat circuit. It blows once, permanently, when the oven overheats — often triggered by a self-clean cycle pushing temperatures past the fuse’s limit. Cheap part, easy swap, but the underlying cause (a failed thermostat or sensor that let the oven run hot) needs to be diagnosed too, or the new fuse will blow again.
Oven Temperature Sensor Failure
The thin metal probe sticking out of the back wall of the oven cavity. It tells the control board how hot the oven is. When it fails — usually drifting in resistance with age — the control board gets bad info, and the oven heats wrong or doesn’t heat at all. Simple resistance test confirms it.
Control Board Fault
The main board signals the element to turn on. When the board has a relay failure, the element never gets power even though the rest of the oven works fine (display, timer, light, fan). Last-resort diagnosis after the cheaper parts upstream are ruled out — control boards are the expensive part of the diagnosis tree, and they’re also the most commonly misdiagnosed.
Broil Element Failure (if only broil is dead)
Same fundamental component as the bake element, just at the top of the cavity. Fails the same way and is replaced the same way. If the oven bakes fine but broil doesn’t work, the diagnosis is the broil element.
Wiring or Door Switch
Rare but real. Power loss to the element from a burned wire connection at the back. Faulty door switch interlock telling the oven the door is open (oven door open = heat shuts off, as a safety). Often diagnosable by sound — clicking from the door area, or no element warm-up sound at all when you preheat.
Before You Call
A few things worth checking before you book — most narrow the cause, a few might resolve it outright:
- Is the oven actually getting power? Open the door — does the interior light come on? Does the display work? If both work, the oven has power and the problem is downstream. If neither works, check the breaker. Electric ovens run on a 240V double breaker — both halves need to be firmly ON, not in a half-tripped middle position.
- Look at the bake element with the door open. Visible breaks, blisters, sagging, dark patches? You’ve found the problem. Don’t run the oven again until it’s replaced — a cracked element can short the circuit.
- Set the oven to broil for 30 seconds. If broil heats (top element glows red) but bake doesn’t, you’ve narrowed the diagnosis to the bake element. If neither heats, the cause is upstream (sensor, fuse, or board).
- Any error codes on the display? F1, F2, F3, F7 codes typically map to sensor or board faults. Write them down. The code pre-sources the right part.
- Did the problem appear right after a self-clean cycle? Self-clean’s extreme heat is the #1 cause of thermal fuse failures and control board damage. If yes, that’s almost always the trigger and the diagnosis starts with the fuse.
Why a Real Diagnosis Matters
Electric oven diagnosis is straightforward when done in person — most causes are visible or take a quick continuity test. The trap is that the symptoms overlap: a faulty sensor and a failed element can both produce “won’t reach temperature,” and the wrong fix on the wrong part costs the homeowner twice.
The 15-Minute Difference
- Continuity tests in the right order. Element first (cheap, common). Thermal fuse next (cheap, common after self-clean). Sensor next (cheap). Control board last (expensive). Each test takes seconds and rules out a wrong-part replacement before it happens.
- Checks bake vs broil to narrow the cause. If broil works and bake doesn’t, the diagnosis is the bake element. If broil doesn’t work and bake does, it’s the broil element. If neither works, the cause is upstream.
- Identifies self-clean damage. Ovens that died after self-clean often have BOTH a blown thermal fuse AND a stressed control board. We check both rather than swap one and have you call back in two months.
What the Repair Typically Costs
Kodiak quotes labour as a flat rate per repair type, after diagnosis but before any work begins. Parts are quoted separately on your invoice. Typical labour ranges:
Electric Oven Heat Repairs
Standard repair (parts replacement or labour-only): Most electric oven heat fixes — bake element, broil element, thermal fuse, oven temperature sensor — fall in the $220–350 range for labour. Parts vary considerably by brand and model (here’s why); elements and sensors are typically cheap, control boards are not.
Control board jobs: Heavier labour and the most expensive parts. Quoted on-site after a real diagnosis confirms the board is the actual issue — many “control board” problems turn out to be cheaper sensors or fuses upstream.
Electric ovens only. Kodiak services electric ovens. Gas ovens (with igniters, gas valves, and flame sensors) require gas-fitter certification we don’t currently hold. If your oven is gas, we’ll tell you upfront and recommend a gas-certified shop.
Service-call fee: $119, applied toward the repair if you proceed.
Your firm quote comes from your tech after diagnosis, before any work begins. You approve before we touch anything. Full pricing details.
Related Reading
- Is It Worth Repairing Your Appliance? — Older wall ovens with expensive faults sometimes don’t make the math work.
- Appliance Maintenance Guide — How to avoid the self-clean trap that kills control boards and blows thermal fuses.
- Find Your Appliance Model Number — Required for sourcing the right bake or broil element.
Ready When You Are
If the bake element looks visibly broken, don’t run the oven — a cracked element can short the circuit and damage more than just the element. Kodiak launches in Edmonton October 2026; join the waitlist for day-one priority booking.