Masterbuilt 9904200043 Gravity 800 Controller Assembly Kit

What Problem This Part Solves

A malfunctioning or failed controller can lead to inconsistent temperatures, poor smoke control, erratic auger behavior, or inability to start the smoker. This replacement assembly restores accurate temperature management and stable grill operation for reliable cooking results.

Key Features 

• Complete controller assembly for Gravity 800 smokers

• WIFI & Bluetooth Enabled

• Digital temperature control with clear readout

• Regulates auger feed and airflow for stable heat

• Durable outdoor-rated components

• Includes wiring harness and mounting hardware

Compatibility / Fits Models

Fits Masterbuilt Gravity 800 pellet smokers
Fits most Gravity 800 configurations—confirm your model before ordering.

Fits Models
MB20040122, MB20040221

Installation / Use Instructions (1–3 steps)

1. Disconnect Power: Unplug the smoker to ensure safe handling of electrical components.

2. Remove Old Controller: Unbolt and disconnect the existing controller assembly and wiring harness.

3. Install Replacement: Mount the 9904200043 controller, reconnect all wiring, and secure hardware. Power on and verify operation before cooking.

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FAQ Section

1. Does this fit my grill?
Yes — this controller assembly is designed for Masterbuilt Gravity 800 pellet smokers. Confirm your exact model before purchasing.

2. What is this part made of?
It includes a durable digital controller, wiring harness, and hardware built to withstand outdoor cooking conditions.

3. How long should this part last?
With proper installation and normal use, this controller assembly should last multiple seasons of grilling and smoking.

4. How do I install it?
Unplug the smoker, remove the old controller and wiring, then mount and connect the new controller assembly following the included hardware and wiring.

5. Why choose this replacement part over others?
This is a genuine Masterbuilt OEM assembly engineered specifically for Gravity 800 smokers, ensuring proper fit, accurate control, and long-term reliability compared to generic controllers.