How to Fix an Oven That Won't Heat Up: Troubleshooting Guide

An oven that won't heat up is frustrating — especially when dinner plans are on the line. Before calling a technician or buying a replacement, work through this troubleshooting guide. Many oven heating issues have simple causes you can diagnose yourself.

Safety First

Before inspecting any part of your oven, turn it off at the wall and unplug it if possible. If you smell gas from a gas oven, do not attempt to operate it — ventilate the area and call your gas provider immediately.

Electric Oven Won't Heat Up: Possible Causes

1. Check the Circuit Breaker

Ovens draw significant power and can trip a circuit breaker. Check your home's fuse box or circuit breaker panel. If the oven's breaker has tripped, reset it. If it trips again immediately, there's an electrical fault that requires a licensed electrician.

2. The Oven Element Has Failed

Electric ovens have one or more heating elements — typically a bake element (bottom) and a broil/grill element (top). Elements can burn out over time, usually showing visible damage (cracks, blistering, burn marks) or dark spots. A failed element is a common cause of heating failure and is usually a relatively affordable repair.

What to do: Turn the oven on and look (carefully) through the glass door to see if the element is glowing red. If one element doesn't glow at all, it has likely failed and needs professional replacement.

3. Temperature Sensor Fault

Modern ovens use a temperature sensor (thermostat probe) to regulate heat. A faulty sensor may cause the oven to heat incorrectly or not at all. If your oven turns on but doesn't reach temperature, the sensor may be the culprit.

4. Control Board Failure

The electronic control board manages all oven functions. Control board failures are less common but can prevent an oven from heating at all, even when other components are fine. Control board repairs or replacements are usually handled by a service technician.

Gas Oven Won't Heat Up: Possible Causes

1. Check the Gas Supply

Ensure other gas appliances in your home (cooktop, hot water system) are working. If they're not, there may be a wider gas supply issue. Check that the gas supply valve behind or under the oven is fully open.

2. Igniter Issue

Gas ovens use an igniter to light the gas. A failing igniter may glow but not get hot enough to open the gas valve, meaning the oven won't light. If you hear a clicking sound but no ignition, the igniter may need replacement.

3. Blocked Burner

Food debris can block oven burner ports. With the oven completely cold and the gas off, carefully inspect the oven burner for blockages. Clean gently with a stiff brush if any buildup is visible.

Quick Checks for All Ovens

• Is the oven set to the correct function (bake, fan, grill)? Make sure you haven't accidentally selected a non-heating mode like "light" or "timer only"
• Is the child lock activated? Some ovens have child locks that disable all functions
• Is the oven door properly closed? Some ovens won't heat if the door is open or ajar
• Has the oven been used recently for self-cleaning? Some ovens disable heating temporarily after a pyrolytic cycle until cooled

When to Call a Technician

If basic troubleshooting doesn't resolve the issue, it's time to call a qualified appliance technician. For gas ovens, any internal gas component repairs must be performed by a licensed gasfitter.

When to Replace Instead of Repair

If your oven is 10+ years old and requires a major repair (control board, element, thermostat), it may be more cost-effective to replace it. A new oven typically costs $700–$2,500 at Oceania Appliances and comes with a fresh 3–6 month in-store warranty plus manufacturer's warranty.

Browse our oven and cooker range or visit us at 2/14 Centre Place, Wetherill Park. Free Sydney delivery.