Masterbuilt
Masterbuilt Pellet Grills & Smokers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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ERR1
The control panel displays ERR1, and the grill will not start the ignition sequence.
Igniter Circuit Fault
ERR2
The control panel displays ERR2, and the grill shuts down shortly after startup.
High Temperature or Overheat Fault
ERR3
The control panel displays ERR3, and the grill will not maintain the set temperature.
Temperature Sensor Open/Short Fault
ERR4
The control panel displays ERR4, and the grill shuts down during cooking.
Low Temperature / Flame-Out Fault
ERR5
Control panel displays ERR5, and the grill will not power on fully or buttons are unresponsive.
Control Board Power or Keypad Fault
ERR6
Control panel displays ERR6, and the grill shuts down when attempting to ignite.
Ignition Timeout / Failed Ignition
LOC
Display shows LOC, and buttons do not respond.
Control Panel Lockout / Child Lock Mode
NOF
Display shows NOF or 'NO FIRE', and the grill shuts down.
Flame Detection / No Fire Condition
P1
Display shows P1, and the grill runs at a very low temperature with long pauses between pellet feeds.
Smoke Setting / Low Feed Program (Not a Fault)
P7
Display shows P7, and the grill struggles to stay lit or frequently flames out in windy or cold conditions.
Extended Pause Smoke Program (Not a Fault but Can Cause Flame-Out)
PF
Display shows PF, and the cook cycle stops unexpectedly.
Power Failure Detected
Symptom
Ash blowing onto food or out of exhaust during cooks
Excessive Airflow / Ash Carryover
Symptom
Buttons on control panel are unresponsive or require very hard presses
Keypad Membrane Failure
Symptom
Control panel resets or restarts randomly during cooks
Intermittent Power or Control Board Fault
Symptom
Display is dim, flickering, or partially unreadable
Display Module Degradation
Symptom
Excessive vibration or rattling noises from grill body during operation
Structural Vibration / Loose Panels
Symptom
Flare-ups or grease fires occurring during cooks
Grease Ignition / Flare-Up
Symptom
Grease leaking from bottom of grill or running down legs
Grease Management System Failure
Symptom
Grease or smoke leaking from door edges instead of exhaust
Door Seal Leakage
Symptom
Grill frequently flames out during long low-and-slow cooks
Intermittent Flame-Out
Symptom
Grill ignites only when pellets are lit manually with a starter cube or torch
Hot Rod Igniter Failure
Symptom
Grill overshoots set temperature by more than 50°F and runs too hot
Temperature Regulation / Overfeeding Pellets
Symptom
Grill powers on, but the auger does not turn, and no pellets feed into the fire pot.
Auger Feed Failure
Symptom
Grill powers on, but the combustion fan does not run, resulting in poor or no flame.
Combustion Fan Failure
Symptom
Grill struggles to reach set temperature and stays 50–100°F below target
Low Temperature / Underheating
Symptom
Heavy white smoke and sooty buildup on food and inside grill
Incomplete Combustion / Poor Airflow
Symptom
Lid thermometer (if equipped) disagrees significantly with digital display
Temperature Measurement Discrepancy
Symptom
Loud grinding or squealing noise from hopper area during operation
Auger or Fan Mechanical Noise
Symptom
Pellet grill will not power on at all (no lights or display).
No AC Power to Control System
Symptom
Pellets back-burning into hopper (smoke or smoldering pellets in hopper)
Backdraft / Hopper Burn-Back
Symptom
Pellets in hopper swell, crumble, or form clumps
Pellet Moisture Contamination
Symptom
Rust forming on grates, inside barrel, or on exterior surfaces
Corrosion / Finish Degradation
Symptom
Strong chemical or plastic smell during initial use or after storage
Residue Burn-Off / Contamination
Symptom
Uneven cooking with hot spots and cold spots across the grate
Heat Distribution Imbalance
Symptom
WiFi or Bluetooth connection to Masterbuilt app is unreliable or fails
Wireless Connectivity Issue
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| ERR1 |
The control panel displays ERR1, and the grill will not start the ignition sequence.
|
Igniter Circuit Fault | View Details |
| ERR2 |
The control panel displays ERR2, and the grill shuts down shortly after startup.
|
High Temperature or Overheat Fault | View Details |
| ERR3 |
The control panel displays ERR3, and the grill will not maintain the set temperature.
|
Temperature Sensor Open/Short Fault | View Details |
| ERR4 |
The control panel displays ERR4, and the grill shuts down during cooking.
|
Low Temperature / Flame-Out Fault | View Details |
| ERR5 |
Control panel displays ERR5, and the grill will not power on fully or buttons are unresponsive.
|
Control Board Power or Keypad Fault | View Details |
| ERR6 |
Control panel displays ERR6, and the grill shuts down when attempting to ignite.
|
Ignition Timeout / Failed Ignition | View Details |
| LOC |
Display shows LOC, and buttons do not respond.
|
Control Panel Lockout / Child Lock Mode | View Details |
| NOF |
Display shows NOF or 'NO FIRE', and the grill shuts down.
|
Flame Detection / No Fire Condition | View Details |
| P1 |
Display shows P1, and the grill runs at a very low temperature with long pauses between pellet feeds.
|
Smoke Setting / Low Feed Program (Not a Fault) | View Details |
| P7 |
Display shows P7, and the grill struggles to stay lit or frequently flames out in windy or cold conditions.
|
Extended Pause Smoke Program (Not a Fault but Can Cause Flame-Out) | View Details |
| PF |
Display shows PF, and the cook cycle stops unexpectedly.
|
Power Failure Detected | View Details |
| – |
Ash blowing onto food or out of exhaust during cooks
|
Excessive Airflow / Ash Carryover | View Details |
| – |
Buttons on control panel are unresponsive or require very hard presses
|
Keypad Membrane Failure | View Details |
| – |
Control panel resets or restarts randomly during cooks
|
Intermittent Power or Control Board Fault | View Details |
| – |
Display is dim, flickering, or partially unreadable
|
Display Module Degradation | View Details |
| – |
Excessive vibration or rattling noises from grill body during operation
|
Structural Vibration / Loose Panels | View Details |
| – |
Flare-ups or grease fires occurring during cooks
|
Grease Ignition / Flare-Up | View Details |
| – |
Grease leaking from bottom of grill or running down legs
|
Grease Management System Failure | View Details |
| – |
Grease or smoke leaking from door edges instead of exhaust
|
Door Seal Leakage | View Details |
| – |
Grill frequently flames out during long low-and-slow cooks
|
Intermittent Flame-Out | View Details |
| – |
Grill ignites only when pellets are lit manually with a starter cube or torch
|
Hot Rod Igniter Failure | View Details |
| – |
Grill overshoots set temperature by more than 50°F and runs too hot
|
Temperature Regulation / Overfeeding Pellets | View Details |
| – |
Grill powers on, but the auger does not turn, and no pellets feed into the fire pot.
|
Auger Feed Failure | View Details |
| – |
Grill powers on, but the combustion fan does not run, resulting in poor or no flame.
|
Combustion Fan Failure | View Details |
| – |
Grill struggles to reach set temperature and stays 50–100°F below target
|
Low Temperature / Underheating | View Details |
| – |
Heavy white smoke and sooty buildup on food and inside grill
|
Incomplete Combustion / Poor Airflow | View Details |
| – |
Lid thermometer (if equipped) disagrees significantly with digital display
|
Temperature Measurement Discrepancy | View Details |
| – |
Loud grinding or squealing noise from hopper area during operation
|
Auger or Fan Mechanical Noise | View Details |
| – |
Pellet grill will not power on at all (no lights or display).
|
No AC Power to Control System | View Details |
| – |
Pellets back-burning into hopper (smoke or smoldering pellets in hopper)
|
Backdraft / Hopper Burn-Back | View Details |
| – |
Pellets in hopper swell, crumble, or form clumps
|
Pellet Moisture Contamination | View Details |
| – |
Rust forming on grates, inside barrel, or on exterior surfaces
|
Corrosion / Finish Degradation | View Details |
| – |
Strong chemical or plastic smell during initial use or after storage
|
Residue Burn-Off / Contamination | View Details |
| – |
Uneven cooking with hot spots and cold spots across the grate
|
Heat Distribution Imbalance | View Details |
| – |
WiFi or Bluetooth connection to Masterbuilt app is unreliable or fails
|
Wireless Connectivity Issue | View Details |
No matching codes found
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