Henny Penny Fryer Codes and What They Mean

/ Commercial Fryers, Troubleshooting / October 1

Many deep fryers from Henny Penny use a digital readout system called Computron 1000 or 8000. These display error codes and messages if there is something ailing the machine. But what exactly do those mean? Below is a cheat sheet with common Henny Penny error codes, so you can diagnose the problem quickly. If you require further assistance with troubleshooting or repairs, contact an authorized service technician for help.

Henny Penny Error Codes

It’s important to note that if there are multiple errors, only the highest priority error will be reported. This list is in numerical order, not order of priority. Some of these errors may have a simpler fix than others (i.e. closing the drain switch). However, many errors will require more work or problem solving. Please contact an authorized technician or Henny Penny tech support at 800-417-8405.


  • E-4: The control board is overheating – Ensure the fryer has proper clearance and check for obstructions on the side louvers of the fryer.



  • E-5: The oil or shortening is overheating – Is a contactor or burner locked on? Switch the unit off and back on again. If the display continues to show E-5, check the heating circuit and temperature probe.



  • E-6: An error has occurred with the temperature probe – It may be faulty, damaged, or disconnected. Check for a broken wire or bad crimp in connector. E-6A means there’s an open circuit. E-6B means there is a short.



  • E-10: The high limit has tripped on your Henny Penny Fryer – Unlike E-5, this is not a software high limit, but like E-5, the oil is likely too hot. Check to ensure the contactor or burner isn’t locked on. This can also occur if the unit is dry-fired or the oil level is too low. Let the unit cool down for 15 to 20 minutes, and push the reset button. If the high limit does not reset, it must be replaced.



  • E-15: The drain handle is open while the fryer is on – The drain should only be opened when the fryer power switch is off. If E-15 occurs while the drain appears closed, check the drain switch.



  • E-20: An error has occurred with the gas ignition system – See errors below for more specific issues.



  • E-20A: The fan vacuum sensor is stuck closed even when the fan is off – There could be a faulty vacuum sensor or a wire short. In the normal sequence, the controller checks to see if the sensor is an open circuit before turning the draft fan on, and in the second sequence, it will verify the fan is on before closing the vacuum sensor. Check to ensure the fan isn’t running as it shouldn’t be until after that first sequence. If you press the timer button, the unit will attempt to ignite again.



  • E-20B: The fan vacuum sensor failed to close when the fan turned on – The fan or vacuum sensor may have failed, otherwise there’s a broken or disconnected wire. If the fan is actually running, the vacuum sensor or vacuum hose is defective, or the wiring connections to the vacuum sensor needs replacing.



  • E-20C: The ignition module is not responding – This occurs when the ignition module is locked out after losing the flame four times. It is either disconnected or faulty. If this error occurs and the unit isn’t even trying to spark, there’s likely a problem with the wiring, the module itself, or the relay on the I/O board. If it does begin sparking but fails, there’s an issue with a chip on the I/O board. The I/O board may need to be replaced.



  • E-20D: The unit is failing to ignite or sense the flame – Turn power off and on again. If the problem persists, check the gas line connections including the gas shut-off valve. The ignition module, gas valve, flame sensor gap, and the wiring for the valve and ignition module must be checked by a technician.



  • E-41: Programming settings have been lost – This can occur if a capacitor on the CPU board fails or because of voltage spikes and dropouts. If resetting power does not fix the issue, a new CPU board may be needed.



  • E-46: Faulty EEPROM write error – EEPROM stands for electrically erasable programmable read-only memory, and this only occurs if the EEPROM chip has failed or if the CPU board has a fault. It is likely the CPU needs replacing.



  • E-47: The analog converter chip has experienced an Analog-to-Digital (A-to-D) failure – This indicates that the 12V supply on the I/O board failed, the analog 5V supply is bad, or the A-to-D chip is bad. Check for moisture damage. Test to see if the speaker works normally by pressing a key on the control panel. If it doesn’t function, or is giving very faint sounds, then the 12V power supply on the I/O board has failed and needs replacing.



  • E-48: There has been an Input System Error – This means the CPU can’t read buttons or digital inputs. Either there is contamination on the CPU board, the wires in the 12-pin cable to the I/O board shorted to ground, or the 12V supply on the I/O board failed/shorted to ground. Check the 12-pin cable and the CPU for damage. They may need replacing.


Please contact an authorized service agent who can help with all your commercial kitchen equipment needs.


Comments are closed.