Parts for Bosch HMB8020/01: Cabinet Parts

The Magnetron is an OEM part for Bosch microwaves. The magnetron generates microwaves used for cooking and heating food. It contains a magnet and vacuum tube that work together with a high-frequency electrical field to produce electromagnetic waves.

Symptoms of a bad magnetron include:

• Microwave not heating or heating unevenly/inconsistently
• Smell of burning within the microwave
• Tripping of electrical breakers when microwave is operated
• Buzzing or crackling noises emanating from inside the unit

This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.

This micro switch is a small, fast-acting on/off switch tripped by a mechanical lever or float to send a signal to the control. Replacing a worn microswitch restores accurate sensing so the appliance starts, stops, and runs when it should. What it does

• Senses the position of a linked mechanism (lever, float, latch) and opens/closes an electrical circuit
• Helps the control enable or disable functions only when conditions are correct
• Failure symptoms include intermittent operation, cycles that won't start, or a unit that keeps running until power is removed

• Disconnect power and, if applicable, shut off water before servicing
• Access the switch and note actuator orientation and terminal layout
• Move wires to the new switch one at a time to maintain correct placement; ensure tight connections
• Manually actuate the mechanism to ensure a positive "click" and proper operation before reassembly

This is a push-button control switch used to complete electrical circuits for appliance functions, restoring responsive button/control operation. It replaces a worn or failed switch to help return normal control-panel behavior. What it does

• Acts as the user-input electrical contact for a specific control or function.
• Completes or breaks the circuit when pressed so the appliance will respond to commands.
• Common symptom: control or button is unresponsive or intermittent.
• Common symptom: the appliance will not start or a function will not engage when the button is pressed.

• One switch.

• Disconnect power before accessing the control panel or wiring to avoid shock.
• Handle the switch and wiring gently to avoid damaging connectors or the control board.

The Fuse is an OEM component specifically designed for Bosch microwaves. It protects internal circuits and components from power surges or overloads that could cause damage. Proper functioning defends the appliance from electrical hazards.

Symptoms of a blown fuse can involve the microwave failing to power on or function after prior episodes of tripped internal safety mechanisms. Repeated events increase replacement needs.

Causes of a bad fuse involve normal wear under prolonged power cycling. However, significant power spikes pose greater fuse risks necessitating timely changes to warranty circuit integrity.  

Symptoms of a bad fuse include:

• Microwave fails to turn on or shows no response to controls
• Lightbulb does not illuminate during heating cycles
• Tripped circuit breakers occur frequently

This OEM Bosch part is also compatible with some Thermador, Blomberg, and Miele microwaves. Replace faulty fuses to restore appliance usability and safety.
 

The PC Board is an OEM component specifically designed for Bosch microwaves. As the central control unit, the PC board regulates and monitors the functioning of the microwave features and components. 

Symptoms of a bad PC board include:

• Lights or display not working properly  
• Inability to start or stop the microwave
• Failure of sensor or preset cooking functions
• Random or unexpected operation of buttons/dials

Causes of a bad PC board can be damage from power surges, spilled liquids inside the unit, or normal wear and tear over several years of use.

This OEM Bosch part is also compatible with Thermador, Gaggenau, and some Kenmore models.

This replacement interior tray provides a stable surface for holding dishes and components inside the appliance, restoring safe storage and proper water flow. It's a straightforward, direct-fit part for worn, cracked, or damaged trays. What it does

• Replaces a damaged or warped interior tray to restore proper support for dishes and components
• Helps maintain correct water drainage and spray access by holding items in the intended position
• Stops shifting or rattling caused by cracked or broken tray sections
• Useful when visible cracks, breaks, or deformation prevent normal use

• Disconnect power and water before starting work
• Remove surrounding racks or panels for access as needed; handle tray carefully to avoid sharp edges
• Align tray into original mounting points and secure; do not force or modify the part

This turntable support ring is the low-profile roller guide that sits under the microwave's glass tray to keep it centered and allow smooth rotation for even cooking. It restores proper tray movement and reduces scraping or wobble. What it does:

• Supports the glass turntable and keeps it aligned on the motor shaft
• Provides rolling contact so the tray rotates smoothly during use
• Helps prevent the tray from wobbling, sticking, or making grinding noises
• Keeps food from contacting the microwave cavity by maintaining correct tray height

• Always unplug the appliance before removing or installing parts
• Remove the glass tray, set the ring in the cavity track, then replace the tray so it sits evenly on the rollers
• Handle the glass tray carefully to avoid chips or cuts; replace damaged trays or rings
• No special tools required for most installs; consult your model's service instructions

This replacement cover protects internal components and restores the proper fit and finish of the original assembly. It secures nearby parts and helps prevent debris from entering sensitive areas. What it does:

• Covers and shields internal components from dirt and loose debris
• Secures the assembly and helps reduce vibration or rattling
• Replaces cracked, broken or missing covers that cause poor fit or unsecured parts
• Restores original appearance where the factory cover is damaged or lost

• Power off and unplug the appliance (or shut off circuit) before starting work
• Remove necessary access panels or screws to reach the cover; retain hardware for reassembly
• Align cover before fastening; do not force or over-tighten screws to avoid damage

This spacer is a small mounting component that helps position and secure adjacent parts for proper alignment and stable operation. It prevents rubbing and maintains correct spacing between assemblies for quieter, more reliable performance. What it does:

• Keeps panels, brackets or assemblies properly spaced to prevent contact and wear
• Helps maintain alignment of moving parts to reduce vibration or noise
• Supports fasteners or clips to ensure a secure fit during operation
• Can prevent leaks or interference caused by misplaced components

• One spacer

• Verify the exact spacer location and orientation before removal; refer to the appliance parts diagram
• Use appropriate hand tools and avoid over-tightening fasteners to prevent deformation
• Disconnect power and water before accessing internal components
• If other parts appear damaged or loose, inspect adjacent components and replace as needed

This replacement fan motor powers the appliance's blower to move air for cooling or ventilation, restoring proper airflow and reducing overheating risk. Designed as a direct-fit replacement when the original motor fails. What it does

• Drives the blower to circulate air through the appliance for cooling/ventilation
• Restores airflow when the original motor is noisy, wobbly, or not running
• Helps prevent overheating or poor temperature control caused by no/low airflow
• Reduces vibration and rattling when a worn motor is replaced

• One fan motor

• Disconnect power before beginning any repair to avoid electrical shock
• Handle mounting brackets and fan blades carefully to avoid bending or damage
• Test operation after installation and reassemble panels before restoring normal use

The Relay is an OEM part for use in Bosch microwaves. This part acts as a safety device, monitoring the temperature within the microwave to prevent overheating. If the microwave reaches an unsafe temperature, the relay thermostat will interrupt the power supply to the heating element or magnetron, effectively halting the cooking process to prevent damage or fire.

The need for replacement can arise from a thermostat that has become overly sensitive or has failed completely, often due to repeated exposure to high temperatures or in the event of a significant overheating incident.

Symptoms of a failing Relay include:

• The microwave unexpectedly turning off during use, especially if it hasn't been running long enough to complete the cooking cycle.
• The microwave refusing to start, which can occur if the thermostat is stuck in the open position, indicating an overheat condition even when the appliance is cool.
• Inconsistent cooking results, where the microwave seems to heat intermittently or not at all, suggesting the thermostat may be cutting off power prematurely.

This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.

The Relay is an OEM part for use in Bosch microwaves. This part acts as a safety device, monitoring the temperature within the microwave to prevent overheating. If the microwave reaches an unsafe temperature, the relay thermostat will interrupt the power supply to the heating element or magnetron, effectively halting the cooking process to prevent damage or fire.

The need for replacement can arise from a thermostat that has become overly sensitive or has failed completely, often due to repeated exposure to high temperatures or in the event of a significant overheating incident.

Symptoms of a failing Relay include:

• The microwave unexpectedly turning off during use, especially if it hasn't been running long enough to complete the cooking cycle.
• The microwave refusing to start, which can occur if the thermostat is stuck in the open position, indicating an overheat condition even when the appliance is cool.
• Inconsistent cooking results, where the microwave seems to heat intermittently or not at all, suggesting the thermostat may be cutting off power prematurely.

This genuine OEM Bosch part is also compatible with Thermador, Gaggenau and select Kenmore models.

Replacement incandescent interior oven lamp that restores cooking-cavity illumination so you can check food without opening the door. Direct-fit replacement sold individually for compatible appliances. What it does:

• Restores interior oven lighting so you can monitor cooking without opening the door
• Replaces a burned-out or flickering bulb to eliminate dark or partially lit oven interiors
• Helps diagnose whether lack of light is due to the bulb
• Fits behind the oven light cover and provides general illumination of the cavity

• Turn off power and allow the oven to cool completely before replacing the lamp
• Remove the oven light cover or shield per your appliance instructions before swapping the bulb
• Avoid touching the glass with bare hands; use a clean cloth or gloves to prevent oils on the bulb
• Reinstall the cover securely and test the lamp; if it still does not light, check the fixture and power