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
Control panel displays ERR1 and grill will not start the ignition sequence
Igniter Circuit Fault
ERR2
Control panel displays ERR2 and grill shuts down shortly after startup
High Temperature or Overheat Fault
ERR3
Control panel displays ERR3 and grill will not maintain set temperature
Temperature Sensor Open/Short Fault
ERR4
Control panel displays ERR4 and grill shuts down during cook
Low Temperature / Flame-Out Fault
ERR5
Control panel displays ERR5 and grill will not power on fully or buttons are unresponsive
Control Board Power or Keypad Fault
ERR6
Control panel displays ERR6 and 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 grill shuts down
Flame Detection / No Fire Condition
P1
Display shows P1 and grill runs at very low temperature with long pauses between pellet feeds
Smoke Setting / Low Feed Program (Not a Fault)
P7
Display shows P7 and 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 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 auger does not turn and no pellets feed into fire pot
Auger Feed Failure
Symptom
Grill powers on but 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
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