Parts for Ge PT7800DH2BB: Control Panel Parts

This electronic control board manages the microwave's user interface and timing, sending commands to run cooking functions. Replacing a failed board restores responsive buttons, a readable display, and consistent operation when the unit otherwise has power.

• Interprets keypad inputs and drives the display
• Coordinates timing and start/stop of cook cycles
• Sends control signals to operate internal relays for cook, fan, light, and turntable functions
• Common symptoms of a failed board include a blank/flickering display, unresponsive controls, won't start, or random beeping/resets

• Disconnect power at the breaker or unplug before service. Microwaves can retain dangerous high voltage.
• Remove the control panel to access the board; document wire locations and take photos for reference.
• Handle the PCB by the edges and use anti-static precautions.
• Transfer any mounting hardware or wire connectors from the original board; seat all connectors fully before reassembly and test.

The Relay Board is an OEM part for GE microwave ovens. It contains the essential relay board and switches that direct power to the magnetron tube, turntable motor, and interior lighting. 

Causes of a faulty relay board can include moisture damage over time deteriorating electrical circuits or stress from temperature fluctuations weakening solder joints and connections.

Symptoms of a bad relay board include:

• Magnetron failing to heat food properly or sporadically overcooking  
• Turntable not spinning or unevenly rotating
• Interior lights not illuminating
• Microwave making buzzing/crackling noises during operation

This board is compatible with select GE, Hotpoint, and RCA models.

The Encoder Board is an OEM replacement part for GE microwaves, engineered to provide control over the microwave's functions. This component translates user input into digital signals for the microwave's main control board. It allows users to adjust power levels, cooking times, and settings accurately. 

The causes for issues with the Encoder Board can be attributed to electrical faults, such as short circuits or component failures, often resulting from power surges or normal wear and tear. 

Symptoms of a malfunctioning Encoder Board include:

• Difficulty in adjusting settings, which may manifest as unresponsive or erratic control panel behavior.
• The microwave starting or stopping unexpectedly, indicating a miscommunication between the user interface and the microwave's control system.
• Inconsistent cooking results, stemming from the inability to accurately set cooking parameters.

This OEM GE part is also compatible with Hotpoint, RCA, and some Kenmore models.

The Power Board is an OEM part for GE microwaves. As the main circuit card, it facilitates transmission of high frequency energy to the magnetron tube responsible for efficient cooking.

Causes for replacement include failure of electronic pathways from continual usage, unexpected power surges, or moisture exposure damaging components over time.

Symptoms requiring replacement are:

• Diagnostic error codes displayed
• Power level options locked on high or unavailable
• Magnetron tube malfunctioning or non-functional
• Controls and display segments unresponsive

This OEM GE part is also compatible with Hotpoint, RCA, and some Kenmore models.

This VFD signal harness connects the appliance control board to the variable-frequency drive, carrying the signals that control motor speed. It restores reliable communication between control and drive so the motor responds correctly. What it does:

• Routes low-voltage control signals from the main control board to the VFD/drive
• Enables proper motor speed commands and feedback for normal operation
• Commonly replaced when intermittent motor response, drive errors, or communication faults occur
• Helps eliminate symptoms like failure-to-start, erratic motor speeds, or fault codes tied to drive communication

• One VFD signal harness

• Disconnect power before servicing to avoid shock or damage
• Inspect connectors and routing; replace if wires or terminals are damaged
• Secure harness away from heat sources and moving parts; match original routing for proper operation

A replacement board supporter that secures the appliance control board to the cabinet, helping keep the board stable and positioned away from wiring and chassis. Restores proper mounting to reduce vibration and movement of the control board. What it does:

• Holds and supports the control/PC board to prevent excessive movement or rattling
• Keeps the board spaced from the chassis and wiring to reduce risk of shorting or contact
• Helps maintain stable electrical connections for reliable control operation
• Reduces noise caused by a loose or vibrating control board
• Can prevent further wear on board mounting points and connectors

• Disconnect power to the appliance before beginning any service.
• Handle the control board by its edges and avoid touching components; use ESD precautions if available.
• Remove nearby panels or components as needed for access; retain all fasteners for reassembly.
• If mounting points or fasteners are damaged, inspect nearby parts and replace as required.

This control knob restores safe, easy operation of a stove or range control. It replaces a cracked, melted, or missing knob so you can adjust burners or oven settings with a secure grip and clear feel. What it does:

• Fits onto the appliance control shaft to select burner or oven settings
• Replaces damaged, loose, stripped, melted, or missing knobs
• Provides a firm, tactile grip for precise control
• Helps prevent accidental changes by seating securely on the shaft

• Disconnect power (and gas, if applicable) before servicing the appliance
• Remove the old knob by pulling it straight off the control shaft
• Align the knob with the control shaft splines and push firmly until fully seated
• If the knob does not install easily, verify shaft alignment and do not force.