Panasonic

Failure Codes

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Locate product failure codes

To allow for easier navigation throughout the tips and guidelines, please enter the appropriate model number to find its corresponding error codes.

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open

 

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

No light in the cavity, no display, when the door is open
Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F05

Internal memory failure has occurred. Replace the controller (DPU) board

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when the START pad is pressed (light in the cavity and display present)

If none of the above solves the problem - replace the controller (DPU) board

Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F05

Internal memory failure has occurred. Replace the controller (DPU) board

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when the START pad is pressed (light in the cavity and display present)

If none of the above solves the problem - replace the controller (DPU) board

Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F05

Internal memory failure has occurred. Replace the controller (DPU) board

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when the START pad is pressed (light in the cavity and display present)

If none of the above solves the problem - replace the controller (DPU) board

Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F05

Internal memory failure has occurred. Replace the controller (DPU) board

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when the START pad is pressed (light in the cavity and display present)

If none of the above solves the problem - replace the controller (DPU) board

Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)

 

F01 + beep

Temperature in the exhaust duct raised above 260 F due to:

F03 or F04

Mismatch between the incoming line voltage and the voltage setting of the oven.

F09

Oven that was designed for 50Hz electricity is attempted to operate in the 60Hz environment. If the model number of the oven in question is listed above, most likely the controller (DPU) board has failed.

F33 or F34

These codes may be triggered by either excessive heat within the oven or poor grounding of either the temp sensor or the controller (DPU) board. Check the following:

F44

This code will appear if there is malfunction of the keypad. Check:

F81, F82, F83, F84

These codes indicate there is no voltage supplied to the primary winding of the high voltage transformer. The relationship between the codes and transformers is as follows:

NOTE: These codes are not caused by defective high voltage components (magnetrons, capacitor, diodes, and transformers. Replacing these components will not solve the problem. After identifying the malfunctioning circuit, perform the troubleshooting in the following order:

F86, F87, F88, F89

These codes indicate malfunction one of the relays (shorted contacts). Therelationship between the models and relays is as follows:

NOTE: Before replacing the relays, make sure that the controller (DPU) board is free of residue or conductive substances (component side). Clean if necessary.

No light in the cavity, no display, when the door is open
Oven will not start when MEMORY (number) pads are pressed.

Most likely, the oven's memory (programming) has not been locked. Perform the PROGRAM LOCK procedure. Refer to programming instructions at the beginning of service manual.

Oven will not accept any programming instructions

Most likely, the oven is in the PROGRAM LOCK mode. Perform the unlocking procedure, as per service manual.

Fuse opens immediately after the START pad is pressed

Most likely, shorted high voltage capacitor is responsible for this symptom. Also check the interlock switch, high voltage diode (for shorts), protector diode (where installed), high voltage transformer (for shorts)

Oven produces insufficient heating power

 

Loud humming sound when oven operates

 

Arcing in the cavity (visible and/or audible)