Parts for Bosch HMCP0252UC/01: Top Outer Case / Magnetron Parts

This temperature regulator is the oven's thermostat. It senses cavity heat and cycles the heating source to hold the set temperature, helping restore accurate baking performance and more consistent cooking results.

• Monitors oven temperature via its sensing bulb/capillary and controls the heating circuit
• Helps maintain the set temperature during preheat and baking
• Common symptoms of a failed regulator: oven runs too hot or too cold, never reaches set temp, wide temperature swings, or won't shut off
• If the knob turns but temperature doesn't respond, the regulator may be faulty

• Disconnect electrical power before servicing; for gas models, also shut off the gas supply
• Access through the control area/back panel; note the original routing of the capillary tube and sensing bulb
• Handle the capillary tube carefully—do not kink or sharply bend; route and secure it in the original path and location
• Transfer the control knob and any mounting hardware from the old regulator if required, then verify proper shaft alignment before reassembly

The Magnetron is an OEM part for Bosch microwave ovens. It functions as the crucial high-frequency power unit responsible for efficiently generating microwave energy to cook and heat food. Working alongside the control board and tray turntable motor, it allows for fast, safe, and even cooking.

Symptoms of a failing magnetron include:

• Extended or incomplete cook times even on high-power settings 
• Abnormal noises emitting from within the unit during operation  
• Tripped internal circuit breakers and error code displays

Causes of failure relate to degrading electronic components after lengthy microwaving use. Exposure to moisture or contaminants may also accelerate wear. 

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

The Fuse is an OEM replacement part for Bosch microwaves. As an essential part of the electrical system, the fuse protects sensitive components from power surges by blowing out in a controlled way when circuits become overloaded. 

Causes of a blown fuse can include:

• Faults developing in connected wiring or components drawing excessive current
• Power fluctuations from the incoming supply
• Age-related degradation over extended periods of use

Symptoms of a bad fuse include:

• The microwave not powering on
• Certain functions like the magnetron or fan not operating 
• Abnormal noises or smells coming from the unit

Replacing the fuse with a factory-rated replacement is important to safely restore full functionality. This prevents potential electrical hazards and further damage to other parts. 

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

This high-voltage transformer steps household power up to energize the magnetron, enabling proper heating in your microwave. Replace it if the unit powers on but doesn't heat, hums loudly, or intermittently blows a fuse.

• Supplies the high voltage needed for magnetron operation
• Common symptoms when failing: runs but no heat
• May cause loud humming, burning odor, or tripped breaker/fuse
• Visible overheating or damage on the transformer can indicate failure

• Unplug the appliance; the high-voltage capacitor can retain a dangerous charge
• Document wire locations and transformer orientation before removal
• Reuse original mounting hardware/brackets and secure all connections firmly

The Diode is an OEM part for Bosch microwaves. This small electronic component regulates electricity flow to heating components.

Causes of failure may relate to stresses from continuous power pulsing. Microwave emissions fluctuate temperatures inside rapidly over time stressing connections.

Symptoms of a bad diode include:

• Inconsistent or incomplete cooking from uneven power distribution
• Failure to properly distribute full heating wattage for expected results
• Error code displays or failure to start due to electrical faults in related boards

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

This plastic-foil capacitor is used in the appliance's electrical circuit to provide stable capacitance. It supports proper motor and power-circuit operation, helping components start and run smoothly while minimizing electrical noise. What it does:

• Stores and releases electrical energy to support motor starting/running or stabilize the power circuit
• Helps reduce electrical noise and voltage spikes in the system
• A failing capacitor can cause hard starting, humming, weak or intermittent operation, or tripped breakers
• Visible bulging, cracks, or heat damage on the capacitor indicates replacement is needed

• 1 capacitor

• Disconnect power at the breaker before servicing; verify no power is present
• Capacitors can retain a charge—discharge safely using appropriate tools and procedures
• Note wire positions and terminal orientation; transfer one lead at a time or take a reference photo
• Mount securely and keep wiring clear of sharp edges, heat sources, and moving parts

The Fuse is an OEM part for Bosch microwaves, crafted to safeguard the appliance by preventing electrical overload. This part acts as a protective barrier for the microwave, ensuring that if the electrical current exceeds safe levels, the fuse will blow, breaking the circuit to stop the flow of electricity. 

Causes of a bad Fuse in a microwave can include power surges, improper use of the appliance, or faults within the microwave’s electrical components, leading to excessive current flow. 

Symptoms of a bad Fuse in a microwave include:

• The microwave not turning on or completely unresponsive
• The appliance suddenly losing power without tripping any house circuit breakers
• An inability to start any cooking cycle despite the display being operational 

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

This filter module conditions incoming AC power and suppresses electrical interference to help protect the appliance's electronics. Replacing a failed module can restore stable operation when power-related faults cause no-starts or intermittent behavior.

• Suppresses electrical noise (EMI/RFI) on the incoming power line
• Helps deliver clean, stable power to the control system
• Failure symptoms include no power, intermittent shutdowns, tripped breaker/fuse, or repeated control resets
• Typically mounted near the appliance's power-entry area

• Disconnect power at the breaker and verify no voltage before servicing
• Access the module at the power-entry area; photograph or label wires before removal
• Move wires one at a time to the new module to maintain correct connections
• Inspect the power cord, connectors, and strain relief; replace any heat-damaged parts

This replacement screw secures appliance panels and components at their mounting points. Swap in a new screw to restore a tight, rattle-free fit when the original fastener is missing, stripped, or corroded.

• Fastens the designated panel, bracket, or component in place
• Replaces a missing, stripped, or rusted screw
• Helps address loose panels, gaps, rattling, or misalignment at the mounting point
• Maintains proper assembly integrity after service or vibration

• Disconnect power; shut off water supply if working near plumbing
• Match to the removed fastener and replace one at a time to preserve alignment
• Start threads by hand to avoid cross-threading; use the correct driver bit
• Tighten snugly and avoid overtightening, especially into plastic or thin sheet metal