Breville Toaster Oven: not heating
What is this symptom?
Is your Breville Toaster Oven not heating? This common issue affects models like the BOV800XL and BOV810, where the oven powers on but the heating elements fail to activate. Often linked to thermal fuses or wiring connections, this problem can disrupt your cooking. Explore our guide for effective solutions.
Important Tips for Breville Models
- Breville Smart Oven models (e.g., BOV800XL) commonly develop no-heat issues from loose/high-resistance spade connectors that overheat, leading to blackened patches and intermittent or total loss of heating; tightening/crimping connectors has restored function for multiple users.
- Some 'power but no heat' cases where the thermal fuse tests good have been fixed by re-soldering a loose relay/high-current solder joint on the power board.
- Community reports indicate a factory reset (commonly described as holding Temperature Conversion + Frozen Foods buttons for 5+ seconds) can resolve rare no-heat cases where controls work but heating does not engage, especially after storage.
Possible Causes
Blown thermal fuse (overheat safety cutoff) opening the heating circuit
How to Identify: Oven may be completely dead OR (in some reports the display works but elements never energize. Multimeter continuity test across the thermal fuse shows open circuit (no continuity. Often occurs after years of use or if airflow/venting is obstructed by grease/dust buildup.
Part: Thermal fuse (safety cutoff fuse)
Loose, overheated, or oxidized internal spade connector(s) or wiring harness connection causing loss of power to heating circuit
How to Identify: Unit powers on but produces no heat or intermittent heat. Visual signs include blackened/charred area near connector, crusty oxidation, melted insulation sleeve, or a connector that feels loose. Wiggling or reseating connections may temporarily restore heating.
Part: High-current spade terminals / wiring connectors (power/heater feed connections)
Control board power relay / solder joint failure (cold solder joint or cracked solder around relay or high-current component)
How to Identify: Display works and functions can be selected, but no heat from any element. Inspection of power board may reveal dull/cracked solder joint(s near a large relay or high-current terminal. Reflowing/adding solder has restored function in reported cases.
Part: Power/control PCB relay and solder joints
Factory reset needed due to firmware/control state issue (controls responsive but heating logic not enabling elements)
How to Identify: Unit appears normal, display responsive, but no heat from any element; issue resolved after performing a factory reset procedure described by users (holding specific button combination for several seconds.
Part: Control logic / settings memory
Failed heating element(s) (open circuit heating element)
How to Identify: Only one zone (top or bottom fails to glow/heat, leading to uneven cooking or no broil/bake. Element continuity test shows open circuit on the failed element. All elements failing simultaneously is less common than fuse/connection/board issues.
Part: Top or bottom heating elements
DIY Solutions
Perform a Breville factory reset (Smart Oven series)
- Unplug the toaster oven for at least 1 minute.
- Plug it back in.
- If your model supports it (e.g., BOV800XL), perform the reset procedure described in community reports: hold the specific button combination (commonly reported as Temperature Conversion + Frozen Foods) for 5+ seconds until the display resets.
- Test a heating mode (e.g., TOAST) and confirm whether the elements glow and heat returns.
Replace the thermal fuse (common no-heat fix in Breville Smart Ovens)
- Unplug the unit and allow it to cool completely.
- Remove the outer cover panels to access internal wiring (take photos as you go to ensure correct reassembly).
- Locate the thermal fuse in the wiring harness (often sleeved and mounted near hot areas).
- Test the thermal fuse for continuity with a multimeter; if open, replace it with the same rating.
- Use proper high-temperature connectors/crimps (avoid household twist caps). Ensure all connections are tight and insulated.
- Reassemble the unit carefully and test heating operation.
Inspect and re-seat/tighten high-current spade connectors and harness plugs (common intermittent/no-heat cause)
- Unplug and cool the oven fully.
- Open the outer housing to access internal wiring and the power/control board area.
- Look for spade connectors with discoloration, looseness, crusty oxidation, or signs of heat damage (blackened patches).
- Carefully pull off the suspect spade connector, clean oxidation if present, and slightly crimp the connector so it fits tighter when reinstalled.
- Re-seat any harness connectors (including fan connector reported by users) firmly into the control board.
- Reassemble and test heating.
Repair a cold solder joint on the power relay (board-level fix)
- Unplug and cool the unit completely.
- Access the power/control circuit board and identify large relay(s) or high-current terminals.
- Inspect for cracked/dull solder joints, especially where heavy components attach.
- Reflow or add solder to reinforce the joint (only if you have electronics soldering experience).
- Reassemble and test heating operation.
Professional Repairs
Replace thermal fuse and inspect for underlying overheating cause (ventilation/grease buildup)
Repair/replace power/control board (relay failure, burnt connector, damaged PCB trace)
Replace heating element assembly (if one or more elements are open circuit)
When to Call a Professional
Preventive Maintenance
-
Keep vents and exterior intake/exhaust areas free of grease and dust; wipe down after greasy cooking and periodically inspect for buildup.: Overheating that can trip the thermal fuse and accelerate connector/board heat damage
Frequency: weekly wipe-down; deep clean monthly (or more often with heavy use) -
Empty and clean the crumb tray regularly to reduce heat retention and fire risk.: Localized overheating and smoke/fire conditions that can contribute to thermal fuse activation
Frequency: every few uses (or after each use with heavy crumbs)
Frequently Asked Questions
Why is my Breville Toaster Oven not heating?
How do I fix Breville Toaster Oven not heating myself?
How much does it cost to fix not heating?
When should I call a technician for not heating?
References & Sources
Community Analytical Insights
Analysis based on real user discussions from appliance repair communities
Can I Fix This Myself?
Common Issues Reported by Users
- Thermal fuse failure (2 mentions)
- Thermistor failure (1 mentions)
User Suggested Solutions
-
Replace the thermal fuse
-
Replace the thermistor
Analysis based on 9 community discussions
View
Sources
Data compiled from real discussions on r/appliancerepair and r/Appliances:
- What's the Best Toaster Oven?
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- Help Choosing a Toaster Oven
- Is it okay to use a higher fuse in a Breville toaster oven?
- Breville BOV800XL toaster oven, will not heat
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Community Discussions
oven heats up a little then stops with an E1 error
Thermistor tested and found to be bad based on resistance reading.
door sensor issue causing random shutdown
Breville Smart Oven is recommended as a reliable replacement.
not enjoying results from microwave cooking
Breville Smart Oven Air is highly recommended for versatile cooking.
overwhelmed by choices, looking for reliable toaster oven
Recommendations for various toaster ovens including Breville, Panasonic, and Ninja Foodi.
oven doesn't have an auto shut off
Consider a Breville toaster oven or a KitchenAid mini oven, preferably refurbished with an extended warranty.
Source: Reddit r/appliancerepair
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