Wmh78019hz-1 Parts

The Filter is an OEM part for Whirlpool microwaves. This part filters grease and other particles from the air as it is vented out of the microwave, particularly when the microwave is used in conjunction with a range. This helps to maintain a clean kitchen environment and prevents grease buildup on the microwave’s internal components.

Causes of a bad filter can include accumulation of grease and food particles over time, exposure to high heat, or general wear and tear.  

Symptoms of a bad filter include:

• Reduced ventilation efficiency
• Excessive smoke or steam lingering in the kitchen
• Grease buildup on kitchen surfaces near the microwave
• Unusual odors during microwave operation

This OEM Whirlpool part is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper and some Kenmore models.

Replace a damaged rack to restore safe, stable support and smooth sliding in the appliance. A new rack brings back full capacity and dependable performance when the original is bent, rusted, or missing.

• Provides a sturdy, level surface to hold items securely during operation
• Slides on existing rails for easy loading and unloading
• Replaces racks that are bent, broken, rusting, or missing
• Helps prevent items from tipping, rattling, or shifting

• Disconnect power and allow any hot surfaces to cool before servicing
• Pull the old rack straight out; retain and transfer any reusable hardware if required
• Align the new rack with the rails and slide it in until fully seated
• Verify smooth travel and proper fit before returning the appliance to service

This turntable support ring sits under the microwave's glass tray and guides smooth rotation for even heating. Replacing a worn or warped ring restores stable, quiet turning and helps eliminate uneven cooking results. What it does:

• Supports the glass turntable and rides on rollers to enable smooth rotation
• Helps keep the tray level for consistent, even cooking
• Reduces friction and scraping noises beneath the tray
• Failure symptoms can include the tray not turning, wobbling, scraping/clicking sounds, or uneven heating

• 1 turntable support ring

• Disconnect power to the microwave before servicing
• Remove the glass tray; lift out the old support ring
• Clean the oven floor/roller track; seat the new ring with rollers facing up and centered on the drive coupler
• Reinstall the glass tray and verify smooth rotation

The Nut is an OEM part for Whirlpool microwaves. It helps secure various parts within the microwave, ensuring proper assembly and function. It is used to fasten items, keeping them securely in place during use.

A bad microwave nut can occur due to wear and tear over time or accidental damage. If the nut becomes loose, stripped, or misplaced, it can lead to instability and compromise affected parts.

Symptoms of a bad microwave nut include:

• Loose or wobbly parts.
• Difficulty in operating the microwave.
• Unusual noises or vibrations during use.

This OEM Whirlpool part can also be used on Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore/Sears brand appliances.

The Waveguide is an OEM component for Whirlpool microwaves. Located inside the metal cooking cavity, this metal channel structure directs high-frequency radio waves from the magnetron tube evenly around food for rapid, volumetric heating.

Causes of a bad waveguide can include corrosion or scale inhibiting conduction over time, or openings allowing leakage of precious waves.

Symptoms of a bad waveguide include:  

• Cold or warm spots within foods as microwaves scatter  
• Slowed or uneven cooking times despite full power setting
• Smelly odor and component overheating due to arcing

Essential for maximizing microwave efficiency, replace now with this OEM waveguide for dependable performance. Fits Whirlpool-made for brands including KitchenAid, Roper, and Amana. 
 

This Light Housing secures and protects the interior lamp assembly, helping keep the compartment safely illuminated. Replace a cracked or heat-damaged housing to restore a stable bulb fit and consistent lighting performance. What it does:

• Provides a stable mount for the interior light bulb/socket
• Shields nearby wiring and components around the lamp area
• Helps position the light for proper illumination inside the compartment
• Common signs of wear: cracked or melted housing, loose bulb fit, lens/cover won't stay attached, intermittent lighting from a poor physical connection

• 1 light housing

• Disconnect power to the appliance before servicing
• Remove the lens/cover and bulb, then unfasten the damaged housing
• Transfer the existing socket, wiring, and any hardware from the old housing as needed
• Reinstall the housing, replace bulb/cover, restore power, and test the light

This is the appliance's main power cord. It delivers household electricity to the unit so it can operate safely and reliably.

• Supplies AC power from the wall outlet to the appliance's internal wiring
• A damaged or failed cord can cause no power, intermittent power, or tripped breakers
• Replacing a worn cord can restore consistent power and improve safety

• Unplug the appliance and turn off power at the breaker before service
• Route and secure the cord to prevent pinching or abrasion

The Magnetron is an OEM part for Whirlpool microwaves. As the primary heating component, it produces electromagnetic waves that provide fast, contact-free food preparation. 

Causes of a bad magnetron include normal wear degrading internal magnets and filaments with extended use, as well as possible damage from power surges that disrupt operation.

Symptoms include:

• Slow or inefficient reheating times requiring prolonged use  
• Imbalanced or "cold" spots in cooked foods
• Cracks, sparks, or burning odors emitted from the microwave cavity

This OEM Whirlpool part is also compatible with KitchenAid, Jenn-Air, and some Maytag microwaves.

This thermistor is a fridge temperature sensor that monitors internal air temperature so the control board can regulate cooling. Replacing a faulty thermistor restores accurate temperature readings and more consistent refrigerator performance. What it does:

• Detects interior temperature and sends readings to the control board
• Helps the compressor and fans cycle correctly to maintain set temperatures
• Common symptom: erratic or incorrect temperature inside the refrigerator
• Common symptom: refrigerator runs constantly or cooling is inconsistent
• Common symptom: temperature-related error codes or temperature alarm messages

• Disconnect power to the appliance before starting any repair
• Handle the sensor and wiring harness carefully to avoid damage
• Route and secure the wiring as original; ensure connectors are fully seated

The Motor-Fan is an OEM part for Whirlpool ranges. This motor works with the lower convection fan to circulate heat underneath and throughout the oven cavity during the baking and broiling functions.  

Causes of a bad motor can include normal wear over several years of continuous usage. Issues may also stem from dust or grease buildup inhibiting free fan rotation.

Symptoms of a bad motor-fan include:

• The lower convection fan not spinning or circulating air 
• Improper or uneven cooking temperatures inside the oven
• Slower cook times compared to when new
• Possible smoke or burning of foods from poor air flow

This essential Whirlpool replacement is also compatible with Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore oven models.

This replaceable refrigerator water filter cartridge helps restore clear, better-tasting drinking water and ice by capturing sediment and common impurities. Designed for a quick swap to keep your fridge dispensing clean water. What it does:

• Filters sediment and particulate to reduce cloudiness in water and ice
• Helps improve taste and odor commonly associated with older filters
• Restores normal water flow and delivery when a clogged filter causes slow dispensing
• Supports routine maintenance to help prevent scale and buildup in the dispenser system

• Shut off the refrigerator water supply before removal to limit spills
• Follow the refrigerator manufacturer's removal/installation motion (push, pull, twist, or bayonet style)
• Flush several full glasses of water after installation to clear air and initial carbon fines
• Check for leaks at the filter and housing after restoring the water supply; discard the old filter per local regulations

This lamp cover is the replacement lens that protects and diffuses your oven's interior light, restoring even illumination while keeping the bulb shielded from heat and food residue. It helps maintain safe, usable oven lighting. What it does:

• Protects the oven light bulb from splashes, crumbs and direct contact.
• Diffuses the bulb for more even interior illumination.
• Replaces a cracked, cloudy, melted or missing lens that can cause dim or exposed lighting.
• Fits over the lamp housing to restore the oven's normal light appearance and function.

• Disconnect power to the appliance before starting and allow the oven to cool completely.
• Handle the cover carefully—wear gloves to protect from sharp edges or broken glass.
• Remove any retaining screws or clips, swap the old cover for the new one, then secure the retainer.
• After installation, restore power and replace the bulb if issues persist.

The High Voltage Capacitor is an OEM part for Whirlpool microwaves. This component allows the microwave to store and discharge high voltage current to the magnetron tube for generating microwave energy. 

Symptoms of a faulty capacitor include:

• Slow or incomplete cooking even on high power levels
• Inconsistent or uneven heating inside the microwave cavity  
• Sparking, burning or smoke emitting from inside components
• An appliance that fails to start or runs intermittently

Causes can be regular wear and tear over many years of use. The capacitor endures heat stresses each time the magnetron operates.

 This part is also compatible with select Maytag, KitchenAid, Jenn-Air, Amana, Magic Chef, Admiral, Norge, Roper, and Kenmore brand microwaves.

This replacement lower cabinet base restores the appliance's bottom support and underside protection to help maintain stability and keep internal components shielded from debris. Fits the factory location under the appliance cabinet. What it does

• Provides structural support for the appliance's lower section to reduce wobble and sag.
• Protects motors, wiring and other components from dirt, moisture and impact at the underside.
• Helps stop or reduce unusual rattling or scraping caused by a damaged or missing base.
• Restores proper clearance and mounting for kickplates and toe panels.

• Disconnect power and, if applicable, gas and water before starting any work.
• Use two people to support the appliance when accessing or replacing the base.
• Keep all factory fasteners; re-use or replace with equivalent OEM screws as required.

This replacement wire harness routes power and signals between a dryer's electrical components so the appliance can run safely and reliably. It replaces a damaged or worn harness to restore proper electrical connections. What it does:

• Connects control, motor, heating, and safety components through factory-style connectors
• Restores interrupted electrical paths that can cause no-start or intermittent operation
• Helps prevent loose or damaged wiring that can trigger error codes or unsafe operation
• Supports proper function of switches, thermostats, and other serviceable parts

• One factory-style wire harness with connectors as shown

• Disconnect power (unplug electric or shut off breaker; turn off gas and unplug gas dryers) before servicing
• Follow the appliance's wiring diagram and route the harness to avoid heat or pinch points
• Ensure all connectors are fully seated and secured with any clips or fasteners provided

This electronic control board is the appliance's main circuit board that manages cycles, timing and user interface functions so the unit responds correctly to settings and commands. Use when control functions are intermittent or unresponsive. What it does:

• Regulates and sequences cycles, timers and electronic functions
• Processes user inputs from the control panel and front display
• Controls power to motors, valves and other components through relay outputs
• Helps prevent erratic or unexpected operation caused by a failed control board
• Commonly linked to symptoms like unresponsive controls, incorrect cycle behavior, error codes or a blank/garbled display

• Disconnect power (unplug or disconnect breaker) before beginning any service
• Handle the board carefully; avoid touching components and use anti-static precautions if available
• Some models require removal of the top or control console to access the board; review the model-specific service manual