Problems you may notice
• Oven will not heat or maintains incorrect temperatures
• Display screen shows error code A3
• Oven may refuse to start or cycles stop unexpectedly
• Uneven cooking results or preheating failures
• Audible beeping or alarm sounds from the control panel
• Unable to select cooking functions or adjust temperature settings
Possible Causes
• Faulty temperature sensor probe or RTD (Resistance Temperature Detector) element
• Loose or disconnected wiring harness connections at the temperature sensor
• Damaged sensor cable or corroded connector pins
• Failed control board electronics unable to read sensor signals
• Power supply voltage fluctuations affecting sensor circuit
• Accumulated grease or food debris on sensor components
• Thermal cutoff activated due to excessive internal temperatures
• Defective heating element causing temperature regulation failure
Precautionary measures
• Verify the oven power cord is fully plugged into a grounded 120V outlet and connections are secure
• Check your home's circuit breaker panel—locate the breaker for the oven circuit and confirm it is in the ON position; if tripped, reset it by switching OFF then back ON
• Ensure the oven door closes completely and latches fully with no gaps or obstruction
• Confirm no control lock feature is enabled on the display panel—review your user manual for the specific lock/unlock button combination for your model
• Allow the oven to cool completely for 30 minutes before attempting to use it again
• Power cycle the oven by switching OFF the circuit breaker for 60 seconds, then switch it back ON to reset the control system
• Check that no objects or racks are blocking the oven cavity or interfering with internal components
• Inspect the oven interior for visible damage, grease buildup, or debris around sensor areas (do not attempt to access internal components)
• Attempt to run a simple bake function at 350°F for 5 minutes to see if the error clears
• If the error code A3 persists after performing these checks, contact a professional appliance repair technician or appliance repair support service to diagnose and repair the temperature sensor or control board
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