Breville Microwave: not turning on

Professional Repair Guide

What is this symptom?

Is your Breville Microwave not turning on? This common issue may manifest as a complete lack of power, with no display, light, or sounds, even when the door is closed and buttons are pressed. Understanding the potential causes and solutions can help you troubleshoot effectively.

Urgency: Medium

Important Tips for Breville Models

  • No official Breville service documentation found for this symptom, but community guidance suggests thermal fuse and door switch issues are common.
  • Advice to test outlet and ensure secure power connection applies to Breville similarly to other brands.

Possible Causes

Power supply issue (outlet / breaker)

How to Identify: Other devices also won’t power on from same outlet or breaker is tripped; resetting breaker may restore power.

Part: Wall outlet / circuit breaker

Faulty door switch or latch assembly

How to Identify: Microwave won’t power on unless door is firmly closed; light may flicker or nothing happens when pressing start; clicking may be absent.

Part: Door switch(es) / latch

Blown internal fuse / thermal fuse

How to Identify: No display or power; power tested at outlet but internal fuse is open — requires multimeter or professional check.

Part: Internal fuse / thermal cutoff

Power cord / wiring fault

How to Identify: Microwave powers intermittently when cord moved; visible damage to cord or plug.

Part: Power cord or internal wiring

Control board or electronic failure

How to Identify: All basic checks (power, outlet, fuse fail; no signs of life despite supply present.

Part: Main control board

DIY Solutions

Check outlet and circuit breaker

Easy 5–10 minutes
  1. Unplug microwave and plug another known good device into same outlet to test power.
  2. Check home circuit breaker panel and reset any tripped breaker feeding the microwave.
  3. Plug microwave directly into known good outlet (no extension cords) to retry powering on.
⚠️ Safety First: Do not use extension cords as permanent solution; high‑power appliances should be on dedicated outlets.

Ensure door is fully closed and latch engages

Easy 2–5 minutes
  1. Open and firmly close the microwave door, ensuring proper engagement of latch.
  2. Check for debris or obstruction in door frame or latch area preventing closure.
  3. Try turning on after confirming door closure.
⚠️ Safety First: Do not force door closed if resistance feels abnormal; inspect for broken plastic parts.

Next step

Choose the next step for not turning on

Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.

Check during diagnosis

Most relevant component to inspect

Door or Lid Switch

Detects whether the appliance door or lid is safely closed before operation.

Typical part-only price
$15 - $55
DIY difficulty
Medium
Estimated time
20-45 mins
Where can I find the model number?

Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.

Find a part that fits my model

Verify the complete model and part number on the retailer's compatibility page before ordering.

Other parts options

Check related components first; use model search as a fallback.

Possible related component

Thermal Fuse

A safety device that cuts off power to the appliance if it starts to overheat.

$10 - $20 · Easy · 10-20 mins

Check fit & price
Possible related component

Power Cord

Supplies mains power to the appliance and includes the model-specific plug and terminal connection.

$15 - $70 · Medium · 20-45 mins

Check fit & price
Possible related component

Main Control Board

The central brain of the appliance that controls all components, cycles, and timings.

$120 - $280 · Medium · 20-40 mins

Check fit & price
Model number required

Model-compatible Microwave parts

Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.

Find a part that fits my model

Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.

Professional Repairs

Replace internal fuse / thermal cutoff

Estimated Cost: $20 - $60 for parts (labor extra)

Repair or replace door switch assembly

Estimated Cost: $30 - $100 for parts (labor extra)

Replace control board

Estimated Cost: $100 - $250+

When to Call a Professional

Power confirmed at outlet but microwave still has no power
Door switch / internal fuse suspected but unsafe to access
Any signs of burning smell, sparks, or physical damage inside microwave

Preventive Maintenance

  • Regularly check power cord and outlet: Loose connections that could cause power loss
    Frequency: monthly
  • Keep door latch area clean: Improper door closure causing failure to start
    Frequency: monthly

Frequently Asked Questions

Why is my Breville Microwave not turning on?
Common causes include power supply issues, faulty door switches, blown fuses, or control board failures.
How do I fix Breville Microwave not turning on myself?
Check the outlet and breaker, ensure the door is closed properly, and look for obstructions.
How much does it cost to fix not turning on?
Repair costs range from $20-$250+ depending on the issue, excluding labor.
When should I call a technician for not turning on?
Call a technician if DIY fixes fail or if you're dealing with internal components like the control board.

References & Sources

Community Analytical Insights

Guidance from available sources; statistical claims are shown only for samples of at least 10 discussions

Common Issues Reported by Users

  • Power supply issue (microwave not plugged in or outlet malfunctioning)
  • Blown fuse or tripped circuit breaker
  • Faulty door switch preventing operation

User Suggested Solutions

  1. Check if the microwave is plugged in and ensure the outlet is functioning by testing it with another appliance.

  2. Inspect the circuit breaker or fuse box for any tripped breakers or blown fuses, and reset or replace them as necessary.

  3. Test the door switch for continuity using a multimeter; if faulty, replace the door switch.

Limited-source guidance; percentages and success-rate claims are not shown
View Sources

Data compiled from real discussions on r/appliancerepair and r/Appliances:

  1. Breville BMO850BSS1BUC1 Microwave Not Turning On

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